CN111056906B - Butter inhibitor for alkaline washing system of methanol-to-olefin process - Google Patents

Butter inhibitor for alkaline washing system of methanol-to-olefin process Download PDF

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CN111056906B
CN111056906B CN201811207016.4A CN201811207016A CN111056906B CN 111056906 B CN111056906 B CN 111056906B CN 201811207016 A CN201811207016 A CN 201811207016A CN 111056906 B CN111056906 B CN 111056906B
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inhibitor
butter
alkaline washing
alkali
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CN111056906A (en
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王洪涛
齐国祯
王莉
王菊
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China Petroleum and Chemical Corp
Sinopec Shanghai Research Institute of Petrochemical Technology
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Sinopec Shanghai Research Institute of Petrochemical Technology
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/11—Purification; Separation; Use of additives by absorption, i.e. purification or separation of gaseous hydrocarbons with the aid of liquids
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/20—Use of additives, e.g. for stabilisation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P30/00—Technologies relating to oil refining and petrochemical industry
    • Y02P30/20—Technologies relating to oil refining and petrochemical industry using bio-feedstock
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P30/00—Technologies relating to oil refining and petrochemical industry
    • Y02P30/40—Ethylene production

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Abstract

The invention relates to a butter inhibitor for an alkaline washing system in a process for preparing olefin from methanol, which mainly solves the problem of more butter in an alkaline washing tower in the prior art. The invention adopts a methanol-to-olefin process alkali washing system butter inhibitor which comprises the following components in parts by mass: 3-40 parts of polymerization inhibitor, 1-20 parts of antioxidant, 2-16 parts of dispersant, 0.1-5 parts of corrosion inhibitor and 20-100 parts of solvent; the technical scheme that the polymerization inhibitor is one or a mixture of more of isopropanolamine, hydrazine hydrate and carbohydrazide, the antioxidant is at least one of N, N-diethylhydroxylamine and sodium thiosulfate, the dispersant is one or a mixture of more of polyalcohol and surfactant, the corrosion inhibitor is sodium phosphate, and the solvent is deionized water well solves the problems, and can be used for inhibiting the methanol-to-olefin alkaline washing system butter.

Description

Butter inhibitor for alkaline washing system of methanol-to-olefin process
Technical Field
The invention relates to a butter inhibitor for an alkaline washing system of a methanol-to-olefin process.
Background
Ethylene and propylene are the core and most basic raw materials of petrochemical industry. With the development of economy, the market demand of ethylene and propylene is more and more vigorous, and the consumption is also increased sharply. However, as the price of crude oil is gradually reduced and the price of crude oil is increased, the production route using traditional petroleum raw materials faces the challenge of short supply of raw materials. Coal resources are relatively rich compared with petroleum resources, the price is low, the consumption of the petroleum resources can be greatly reduced by adopting coal to prepare ethylene and propylene through methanol, and the cost is saved. The Methanol To Olefin (MTO) process is produced under the environment, and shows great potential advantages.
Methanol-To-Olefin (MTO for short) refers To a technology for producing Methanol from natural gas or coal as a raw material through synthesis gas, and then generating low-carbon olefins such as ethylene, propylene and the like from the Methanol under the action of a catalyst. The MTO technology develops a new process route for preparing chemical products from unconventional petroleum resources, and becomes a research focus for synthesizing olefin from the unconventional petroleum resources.
In an olefin recovery system of an MTO process technology, alkaline washing technology is mostly adopted at home and abroad to remove H in MTO product gas 2 S、CO 2 And the like. During the alkaline washing, some polymers are generated in the alkaline washing tower, and the polymers are condensed in the alkaline liquor to form yellow water type alkaline emulsion, namely butter. The butter can be converted into high polymer through heating or oxidation to form scale, thereby blocking alkaline washing distributors and filler gaps in each section, generating bias current in the tower, reducing the absorption effect of the alkaline washing tower, shortening the operation period of the alkaline washing tower and seriously affecting the long-period stable operation of the device. In addition, the discharge of the waste alkali containing a large amount of butter brings difficulties to the operation of downstream processing facilities.
Research and analysis show that the product gas of the MTO device contains a small amount of oxygen-containing compounds. The oxygen-containing compounds have strong activity at high temperature and are very easy to react and polymerize, namely, the oxygen-containing compounds such as aldehyde, ketone and the like with active hydrogen atoms on two molecules of alpha-position carbon atoms are subjected to addition reaction under the action of NaOH to generate a beta-hydroxyl product, and then the beta-hydroxyl product is further added to a polymer with certain molecular weight.
The production of the grease in the alkaline washing tower is generally reduced by optimizing the process conditions and adding measures such as a grease inhibitor. CN101591214A proposes an aldehyde ketone condensation inhibitor composed of amino acid, ethylene amine and alcohol amine, and combines a water-soluble free radical polymerization inhibitor and an antioxidant solubilizer to form an ethylene device alkaline washing tower polymer inhibitor, which can inhibit the generation of polymers from various angles. CN106467444A proposes a butter inhibitor prepared from amine compounds and alcohol compounds, which inhibits the aldehyde-ketone condensation and olefin cross-linking polymerization in the system to a certain extent.
The MTO reaction process is different from the traditional ethylene steam cracking process in nature, the product contains more oxygen-containing compounds, the reason for generating butter is different from that of ethylene butter, and the using effect of an ethylene butter inhibitor on an alkaline washing tower of an MTO device is poor. Meanwhile, the butter inhibitor of the existing MTO alkaline washing system also has the problems of unstable use effect, high consumption, high cost and the like.
The invention solves the problem in a targeted way.
Disclosure of Invention
The invention aims to solve the technical problem of more butter in the prior art, and provides a novel butter inhibitor for inhibiting butter generation in an alkaline washing system of a methanol-to-olefin process and a method for inhibiting butter generation by using the same. The method is used for inhibiting the butter in the alkaline washing system of the methanol-to-olefin process, and has the advantage of less butter generation amount.
In order to solve one of the problems, the technical scheme adopted by the invention is as follows: a butter inhibitor for an alkaline washing system of a methanol-to-olefin process comprises the following components in parts by mass: 3 to 40 portions of polymerization inhibitor, 1 to 20 portions of antioxidant, 2 to 16 portions of dispersant, 0.1 to 5 portions of corrosion inhibitor and 20 to 100 portions of solvent.
Wherein the polymerization inhibitor is one or a mixture of more of isopropanolamine, hydrazine hydrate and carbohydrazide; the antioxidant is at least one of N, N-diethylhydroxylamine and sodium thiosulfate; the dispersant is one or a mixture of a plurality of polyols and surfactants; the corrosion inhibitor is sodium phosphate, and the solvent is deionized water.
In the above technical scheme, preferably, the polyhydric alcohol is propylene glycol, and the surfactant is sodium dodecyl benzene sulfonate, sodium polyacrylate, alkylphenol ethoxylates, or fatty alcohol-polyoxyethylene ether.
In the above technical scheme, preferably, the butter inhibitor comprises the following components in parts by mass: 5 to 30 portions of polymerization inhibitor, 5 to 15 portions of antioxidant, 4 to 12 portions of dispersant, 0.5 to 3 portions of corrosion inhibitor and 30 to 80 portions of solvent.
In the above technical solution, preferably, the polymerization inhibitor is a mixture of isopropanolamine and hydrazine hydrate; the antioxidant is a mixture of N, N-diethylhydroxylamine and sodium thiosulfate; the dispersing agent is a mixture of propylene glycol, sodium dodecyl benzene sulfonate and fatty alcohol-polyoxyethylene ether.
In the above technical solution, preferably, the polymerization inhibitor isopropanolamine and hydrazine hydrate have a mass part ratio of (0.5-10): 1; the mass part ratio of the antioxidant N, N-diethylhydroxylamine to the sodium thiosulfate is (0.2-5): 1; the mass parts of the dispersing agent propylene glycol, sodium dodecyl benzene sulfonate and fatty alcohol-polyoxyethylene ether are (1-10): (0.5-5): 1.
in the above technical scheme, preferably, the polymerization inhibitor, the antioxidant, the dispersant and the corrosion inhibitor are uniformly dispersed in the solvent to form a stable solution system. The polymerization inhibitor, the antioxidant, the dispersant and the corrosion inhibitor are commonly used in a butter inhibitor, and play an unexpected synergistic effect in inhibiting butter in an alkaline washing tower of a methanol-to-olefin device.
In order to solve the second problem, the invention adopts the following technical scheme: the butter inhibitor is added into an alkaline tower of an alkaline washing system of the methanol-to-olefin process to inhibit the generation of butter, and the amount of the butter inhibitor added into the alkaline tower of the methanol-to-olefin separation unit is 20-180 ppm.
In the above technical solution, preferably, the mass content of the aldehyde ketone in the product gas at the inlet of the caustic tower of the methanol-to-olefin separation unit is less than 300ppm.
In the above technical scheme, preferably, the butter inhibitor is continuously injected on a strong alkali, medium alkali and weak alkali circulating alkali line of the alkali washing tower.
In the patent, methanol To Olefin (MTO) is converted into a product gas containing ethylene and propylene at high selectivity based on a SAPO-34 molecular sieve catalyst and a catalyst continuous reaction-regeneration fluidization technology, and the product gas enters a product gas compressor after being cooled, subjected to catalyst fine powder removal and water removal. Generally, four-stage compression is adopted, an oxide water washing tower and a caustic washing tower are arranged at a third-stage compression outlet, and the operating conditions of the caustic washing tower are as follows: the temperature of the alkaline washing tower is about 42 ℃, and the pressure of the alkaline washing tower is about 1.3 MPaG. The product gas firstly enters an oxide water washing tower, and enters an alkali washing tower after entrained oxygen-containing compounds are removed, so that acidic substances and oxygen-containing compounds are further removed.
According to the method, the grease inhibitor is injected into the alkaline washing tower of the methanol-to-olefin (MTO) separation unit, the generation amount of grease in the alkaline washing tower is inhibited, the components such as the polymerization inhibitor, the antioxidant and the dispersant of the grease inhibitor multi-component are adopted, and the components play a synergistic role, so that an unexpected synergistic effect is achieved in inhibiting grease in the alkaline washing tower in the methanol-to-olefin process, the polymerization of oxides is obviously inhibited, the generated grease is well dispersed, the problem that much grease is generated in the alkaline washing tower in the MTO process is effectively solved, the mass content of polymers in the alkaline solution can be reduced to 0.13%, the pressure difference of the alkaline washing tower can reach 24kPa, and a good technical effect is achieved.
The present invention will be further illustrated by the following examples, but is not limited to these examples.
Detailed Description
Comparative example 1
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, no butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkaline liquor of the MTO alkaline washing system, the device runs for 168 hours, sampling is performed for analysis, the polymer content in the alkaline liquor is calculated, the polymer content in the alkaline liquor reaches 1.75%, and the pressure difference of the alkaline washing tower is increased to 51kPa.
[ example 1 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 18 parts of isopropanolamine, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.24 percent, and the pressure difference of the alkali washing tower is increased to 29kPa.
[ example 2 ]
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, and a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, wherein the butter inhibitor comprises the following components in parts by mass: 18 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168h, and the polymer content in the alkali liquor is calculated by sampling and analyzing. The polymer content in the alkali liquor reaches 0.22%, and the pressure difference of the alkali washing tower is increased to 29kPa.
[ example 3 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 18 parts of carbohydrazide, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.25%, and the pressure difference of the alkali washing tower is increased to 29kPa.
[ example 4 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168h, and the polymer content in the alkali liquor is calculated by sampling and analyzing. The polymer content in the alkali liquor reaches 0.18 percent, and the pressure difference of the alkali washing tower is increased to 28kPa.
[ example 5 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 10 parts of sodium thiosulfate, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.29 percent, and the pressure difference of the alkali washing tower is increased to 31kPa.
[ example 6 ] A method for producing a polycarbonate
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, and a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, wherein the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 10 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at the temperature of 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.31 percent, and the pressure difference of the alkali washing tower is increased to 31kPa.
[ example 7 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 8 parts of 1, 2-propylene glycol, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.29 percent, and the pressure difference of the alkali washing tower is increased to 30kPa.
[ example 8 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium dodecyl benzene sulfonate, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at the temperature of 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.33 percent, and the pressure difference of the alkali washing tower is increased to 31kPa.
[ example 9 ] A method for producing a polycarbonate
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 8 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.31 percent, and the pressure difference of the alkali washing tower is increased to 30kPa.
[ example 10 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of sodium dodecyl benzene sulfonate, 4 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.27%, and the pressure difference of the alkali washing tower is increased to 29kPa.
[ example 11 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium polyacrylate, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.35%, and the pressure difference of the alkali washing tower is increased to 32kPa.
[ example 12 ] A method for producing a polycarbonate
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, and a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, wherein the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 8 parts of alkylphenol polyoxyethylene, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, and a sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.31 percent, and the pressure difference of the alkali washing tower is increased to 30kPa.
[ example 13 ] to prepare a suspension
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 2 parts of isopropanolamine, 1 part of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.69%, and the pressure difference of the alkali washing tower is increased to 38kPa.
[ example 14 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 3.3 parts of isopropanolamine, 1.7 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.37%, and the pressure difference of the alkali washing tower is increased to 32kPa.
[ example 15 ]
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, and a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, wherein the butter inhibitor comprises the following components in parts by mass: 20 parts of isopropanolamine, 10 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.14 percent, and the pressure difference of the alkali washing tower is increased to 26kPa.
[ example 16 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 26.7 parts of isopropanolamine, 13.3 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at the temperature of 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.13%, and the pressure difference of the alkali washing tower is increased to 26kPa.
[ example 17 ]
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, and a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, wherein the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 0.5 part of sodium thiosulfate, 0.5 part of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, and a sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.47%, and the pressure difference of the alkali washing tower is increased to 34kPa.
[ example 18 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 2.5 parts of sodium thiosulfate, 2.5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at the temperature of 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.27%, and the pressure difference of the alkali washing tower is increased to 30kPa.
[ example 19 ]
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, and a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, wherein the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 7.5 parts of sodium thiosulfate, 7.5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at the temperature of 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.16%, and the pressure difference of the alkali washing tower is increased to 26kPa.
[ example 20 ] A method for producing a polycarbonate
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 10 parts of sodium thiosulfate, 10 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.15%, and the pressure difference of the alkali washing tower is increased to 26kPa.
[ example 21 ] to provide
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, and a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, wherein the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 1 part of 1, 2-propylene glycol, 0.5 part of sodium dodecyl benzene sulfonate, 0.5 part of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, and a sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.30%, and the pressure difference of the alkali washing tower is increased to 31kPa.
[ example 22 ] to provide
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 2 parts of 1, 2-propylene glycol, 1 part of sodium dodecyl benzene sulfonate, 1 part of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.22%, and the pressure difference of the alkali washing tower is increased to 29kPa.
[ example 23 ] to provide
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 6 parts of 1, 2-propylene glycol, 3 parts of sodium dodecyl benzene sulfonate, 3 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, and a sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.17%, and the pressure difference of the alkali washing tower is increased to 26kPa.
[ example 24 ] A method for producing a polycarbonate
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 8 parts of 1, 2-propylene glycol, 4 parts of sodium dodecyl benzene sulfonate, 4 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, and a sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.17%, and the pressure difference of the alkali washing tower is increased to 25kPa.
[ example 25 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 0.1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at the temperature of 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.18 percent, and the pressure difference of the alkali washing tower is increased to 28kPa.
[ example 26 ] to
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 0.5 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at the temperature of 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, and a sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.18 percent, and the pressure difference of the alkali washing tower is increased to 28kPa.
[ example 27 ] A method for producing a polycarbonate
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, and a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, wherein the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 3 parts of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at the temperature of 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.17%, and the pressure difference of the alkali washing tower is increased to 28kPa.
[ example 28 ] to
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, and a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, wherein the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 5 parts of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.17%, and the pressure difference of the alkali washing tower is increased to 28kPa.
[ example 29 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 20 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, and a sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.14%, and the pressure difference of the alkali washing tower is increased to 24kPa.
[ example 30 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 30 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.15%, and the pressure difference of the alkali washing tower is increased to 25kPa.
[ example 31 ]
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, and a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, wherein the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 80 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, and a sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.24 percent, and the pressure difference of the alkali washing tower is increased to 29kPa.
[ example 32 ] A method for producing a polycarbonate
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, and a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, wherein the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 100 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.28 percent, and the pressure difference of the alkali washing tower is increased to 30kPa.
[ example 33 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 6 parts of isopropanolamine, 12 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.20 percent, and the pressure difference of the alkali washing tower is increased to 28kPa.
[ example 34 ]
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, and a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, wherein the butter inhibitor comprises the following components in parts by mass: 16 parts of isopropanolamine, 2 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, and a sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.23 percent, and the pressure difference of the alkali washing tower is increased to 29kPa.
[ example 35 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 1.7 parts of sodium thiosulfate, 8.3 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at the temperature of 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.28 percent, and the pressure difference of the alkali washing tower is increased to 30kPa.
[ example 36 ]
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, and a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, wherein the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 8.3 parts of sodium thiosulfate, 1.7 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.27%, and the pressure difference of the alkali washing tower is increased to 30kPa.
[ example 37 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 3.2 parts of 1, 2-propylene glycol, 1.6 parts of sodium dodecyl benzene sulfonate, 3.2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.20%, and the pressure difference of the alkali washing tower is increased to 29kPa.
[ example 38 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 5 parts of 1, 2-propylene glycol, 2.5 parts of sodium dodecyl benzene sulfonate, 0.5 part of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.19%, and the pressure difference of the alkali washing tower is increased to 28kPa.
[ example 39 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 5 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 1 part of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, and a sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.17%, and the pressure difference of the alkali washing tower is increased to 26kPa.
TABLE 1
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[ example 40 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at the temperature of 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 20ppm, the device is operated for 168 hours, and a sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.72 percent, and the pressure difference of the alkali washing tower is increased to 37kPa.
[ example 41 ] to provide a pharmaceutical composition
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 180ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.11%, and the pressure difference of the alkali washing tower is increased to 23kPa.
[ example 42 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 500h, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.17%, and the pressure difference of the alkali washing tower is increased to 27kPa.
[ example 43 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 20ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.10%, and the pressure difference of the alkali washing tower is increased to 23kPa.
[ example 44 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 300ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.50%, and the pressure difference of the alkali washing tower is increased to 33kPa.
Comparative example 2
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, and a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, wherein the butter inhibitor comprises the following components in parts by mass: 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 1.24%, and the pressure difference of the alkali washing tower is increased to 43kPa.
Comparative example 3
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, and a sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.81%, and the pressure difference of the alkali washing tower is increased to 39kPa.
Comparative example 4
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, and a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, wherein the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 1 part of sodium phosphate and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.34%, and the pressure difference of the alkali washing tower is increased to 34kPa.
Comparative example 5
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 12 parts of isopropanolamine, 6 parts of hydrazine hydrate, 5 parts of sodium thiosulfate, 5 parts of N, N-diethylhydroxylamine, 4 parts of 1, 2-propylene glycol, 2 parts of sodium dodecyl benzene sulfonate, 2 parts of fatty alcohol-polyoxyethylene ether and 63 parts of deionized water. And sequentially adding a solvent, a polymerization inhibitor, an antioxidant, a dispersant and a corrosion inhibitor into a stirring kettle, and stirring for 2 hours at the temperature of 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.20%, and the pressure difference of the alkali washing tower is increased to 29kPa.
[ COMPARATIVE EXAMPLE 6 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 300ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass according to the composition of example 14 in CN 101591214A: 20 parts of monoethanolamine, 20 parts of N, N-diethylhydroxylamine, 10 parts of sodium thiosulfate and 50 parts of deionized water. Sequentially adding the components into a stirring kettle, and stirring for 2 hours at the temperature of 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, a sample is taken for analysis, the polymer content in the alkali liquor is calculated, the polymer content in the alkali liquor reaches 1.78 percent, the pressure difference of the alkali washing tower is increased to 52kPa, the circulation amount of alkali in each section is reduced, and the long-period stable operation of the device is seriously influenced.
Comparative example 7
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 300ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass according to the composition of example 1 in CN 106467444A: 40 parts of isopropyl hydroxylamine, 25 parts of isopropanol and 260 parts of deionized water. Sequentially adding the components into a stirring kettle, and stirring for 2 hours at the temperature of 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 80ppm, the device is operated for 168 hours, sampling is carried out for analysis, the polymer content in the alkali liquor is calculated, the polymer content in the alkali liquor reaches 0.71 percent, the pressure difference of the alkaline tower is increased to 39kPa, and the effect is lower than that of the embodiment of the invention.
Obviously, by adopting the method of the invention, the polymer content in the alkali liquor can be obviously reduced and the pressure difference of the alkali washing tower is stabilized by injecting the butter inhibitor into the alkali washing tower, thus having great technical advantages.

Claims (6)

1. A butter inhibitor for an alkaline washing system of a methanol-to-olefin process comprises the following components in parts by mass: 3-40 parts of polymerization inhibitor, 1-20 parts of antioxidant, 2-16 parts of dispersant, 0.1-5 parts of corrosion inhibitor and 20-100 parts of solvent; the polymerization inhibitor is a mixture of isopropanolamine and hydrazine hydrate; the antioxidant is a mixture of N, N-diethylhydroxylamine and sodium thiosulfate; the dispersing agent is a mixture of propylene glycol, sodium dodecyl benzene sulfonate and fatty alcohol-polyoxyethylene ether; the corrosion inhibitor is sodium phosphate; the solvent is deionized water; the polymerization inhibitor isopropanolamine and hydrazine hydrate have the mass part ratio of (0.5-10): 1; the antioxidant N, N-diethylhydroxylamine and sodium thiosulfate have the mass part ratio of (0.2-5): 1; the mass part ratio of the dispersing agent propylene glycol, sodium dodecyl benzene sulfonate and fatty alcohol-polyoxyethylene ether is (1-10): (0.5-5): 1.
2. the methanol-to-olefin process alkaline washing system butter inhibitor according to claim 1, characterized in that the butter inhibitor comprises the following components in parts by mass: 5 to 30 parts of polymerization inhibitor, 5 to 15 parts of antioxidant, 4 to 12 parts of dispersant, 0.5 to 3 parts of corrosion inhibitor and 30 to 80 parts of solvent.
3. The methanol-to-olefin process caustic wash system butter inhibitor of claim 1, wherein the polymerization inhibitor, the antioxidant, the dispersant and the corrosion inhibitor are uniformly dispersed in the solvent to form a stable solution system.
4. A method for inhibiting butter formation in an alkaline washing system of a methanol-to-olefin process, which adopts any one of butter inhibitors in claims 1 to 3, and is characterized in that the butter inhibitor is added into an alkaline washing tower of the methanol-to-olefin process alkaline washing system to inhibit butter formation, and the mass content of the butter inhibitor added into the alkaline washing tower of a methanol-to-olefin separation unit is 20 to 180ppm.
5. The method for inhibiting the formation of yellow oil in the alkaline washing system of the methanol-to-olefin process according to claim 4, wherein the mass content of aldehyde ketone in the product gas at the inlet of the alkaline washing tower of the methanol-to-olefin separation unit is less than 300ppm.
6. The method for inhibiting the generation of butter oil in the alkaline washing system of the methanol-to-olefin process as claimed in claim 4, wherein the butter inhibitor is continuously injected on the circulating alkaline line of strong alkali, medium alkali and weak alkali of the alkaline washing tower.
CN201811207016.4A 2018-10-17 2018-10-17 Butter inhibitor for alkaline washing system of methanol-to-olefin process Active CN111056906B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101838553A (en) * 2010-04-07 2010-09-22 浙江杭化科技有限公司 Butter inhibitor for ethylene unit alkaline washing tower
CN105884566A (en) * 2014-12-01 2016-08-24 中石化洛阳工程有限公司 Butter inhibitor for MTO (methanol to olefins) device alkaline washing towers and preparation method thereof
CN106467447A (en) * 2015-08-20 2017-03-01 中国石油化工股份有限公司 The method of olefinic polymerization in suppression methanol-to-olefins device caustic wash tower

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101838553A (en) * 2010-04-07 2010-09-22 浙江杭化科技有限公司 Butter inhibitor for ethylene unit alkaline washing tower
CN105884566A (en) * 2014-12-01 2016-08-24 中石化洛阳工程有限公司 Butter inhibitor for MTO (methanol to olefins) device alkaline washing towers and preparation method thereof
CN106467447A (en) * 2015-08-20 2017-03-01 中国石油化工股份有限公司 The method of olefinic polymerization in suppression methanol-to-olefins device caustic wash tower

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