CN111013330A - Dehydration composition and preparation method and application thereof - Google Patents
Dehydration composition and preparation method and application thereof Download PDFInfo
- Publication number
- CN111013330A CN111013330A CN201910290609.XA CN201910290609A CN111013330A CN 111013330 A CN111013330 A CN 111013330A CN 201910290609 A CN201910290609 A CN 201910290609A CN 111013330 A CN111013330 A CN 111013330A
- Authority
- CN
- China
- Prior art keywords
- sodium
- composition
- glycol
- gluconate
- dehydration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/263—Drying gases or vapours by absorption
-
- 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
- C07D—HETEROCYCLIC COMPOUNDS
- C07D301/00—Preparation of oxiranes
- C07D301/32—Separation; Purification
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D303/00—Compounds containing three-membered rings having one oxygen atom as the only ring hetero atom
- C07D303/02—Compounds containing oxirane rings
- C07D303/04—Compounds containing oxirane rings containing only hydrogen and carbon atoms in addition to the ring oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/106—Removal of contaminants of water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/202—Alcohols or their derivatives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/202—Alcohols or their derivatives
- B01D2252/2023—Glycols, diols or their derivatives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/204—Amines
- B01D2252/20478—Alkanolamines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/24—Hydrocarbons
- B01D2256/245—Methane
-
- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Supply & Treatment (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention provides a dehydration composition, a preparation method and application thereof, wherein the dehydration composition comprises the following components: (1) glycols and/or glycerin; (2) an alkali metal salt; (3) an alcohol amine; (4) an iron ion chelating agent; (5) a polyether polyol. The dehydration composition can well realize dehydration treatment of a system to be treated. Moreover, in the regeneration process of the dehydration composition, as the glycol and/or the glycerol, the alkali metal salt, the iron ion chelating agent, the alcohol amine and the polyether polyol are/is added into the system, the corrosion to equipment can be obviously inhibited, and the consumption of the dehydration composition in the regeneration process is greatly reduced.
Description
Technical Field
The invention belongs to the technical field of dehydration compositions, and particularly relates to a dehydration composition, and a preparation method and application thereof.
Background
The moisture content in natural gas is one of the important criteria for the quality of natural gas. If the saturated water content in the natural gas is too high, the pipeline conveying capacity can be reduced, and due to the change of conveying pressure and the surrounding environment, hydrates and acidic substances formed in the natural gas can corrode a pipeline, even a burner of a gas heating furnace of a user is flamed out, so that serious potential safety hazards exist. Dehydration of natural gas is an important process requirement in the production and transportation of natural gas.
The triethylene glycol dehydration process has the advantages of high hygroscopicity, easiness in regeneration, small occupied area, compact equipment arrangement, easiness in moving and installation, no need of external force in operation and the like due to mature process, and is widely applied to natural gas dehydration at home and abroad. However, in the actual operation process, due to the influence of acidic components in the natural gas, the U-shaped heating pipe of the reboiler in the recovery device is corroded and perforated, and the circulating pipeline is blocked and corroded, so that the device is in failure in operation, and the normal production of a gas collecting station and a gas well is influenced.
In the process of producing butyl rubber by a slurry low-temperature polymerization method by taking methyl chloride as a diluent, unreacted methyl chloride as a solvent and unreacted monomer isobutene and isoprene which are not converted need to be dehydrated, dried, refined and recycled, and a combined process of absorbing a trace amount of water in the methyl chloride by using glycol and then drying by using an alumina drying agent is industrially adopted. However, the regenerated glycol contains a certain amount of methyl chloride, and the methyl chloride glycol dehydration regeneration system has a corrosion problem in the operation process of equipment due to HCl generated by high-temperature hydrolysis of the methyl chloride.
Disclosure of Invention
In order to ameliorate the deficiencies of the prior art, it is an object of the present invention to provide a dehydration composition, a method of preparation and use thereof; the dehydration composition can not only remove water in a system with high efficiency, but also inhibit the corrosion of acidic substances to equipment when the dehydration composition is subjected to regeneration treatment, and simultaneously greatly reduce the consumption of the dehydration composition.
The purpose of the invention is realized by the following technical scheme:
a dewatering composition, wherein the dewatering composition comprises the following components:
(1) glycols and/or glycerin; (2) an alkali metal salt; (3) an alcohol amine; and (4) iron ion chelating agents.
According to the invention, the dehydration composition comprises the following components in percentage by mass:
(1) 60-99.4% of glycol and/or glycerol; (2) alkali metal salt 0.1-15%; (3) 0.5 to 25 percent of alcohol amine; (4) 10-10000ppm of iron ion chelating agent; the sum of the mass percentages of the components is 100 percent.
According to the invention, the diol is selected from at least one of the compounds of formula 1:
in the formula 1, n is 2 or 3, and m is an integer of 1-5.
For example, m is 1, 2, 3, 4 or 5.
For example, the compound represented by formula 1 is ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, tetrapropylene glycol, or the like.
According to the invention, the addition of the diol and/or the glycerol in the dehydration composition can well realize the absorption of water in a system to be treated and ensure the removal of water in the system to be treated. Illustratively, the diol and/or glycerol is present in an amount of 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 99% or 99.4% by mass.
According to the present invention, the alkali metal salt is selected from the group consisting of alkali metal acetates, alkali metal glycolates, alkali metal halides, alkali metal nitrates, their corresponding hydrates, or mixtures thereof, the alkali metal is selected from at least one of lithium, sodium, potassium, rubidium, and cesium, illustratively the alkali metal salt is selected from the group consisting of α -sodium glycolate, lithium nitrate, sodium nitrate, potassium nitrate, cesium nitrate, rubidium nitrate, lithium chloride, sodium chloride, potassium chloride, rubidium chloride, cesium chloride, lithium acetate, sodium acetate, potassium acetate, rubidium acetate, cesium acetate, and corresponding hydrates, such as sodium acetate trihydrate and the like.
According to the invention, the alcohol amine is selected from at least one of triethanolamine, diethanolamine and ethanolamine. The addition of the alcohol amine has the effects of neutralizing acidic components in a dry substance and buffering pH. Illustratively, the alcohol amine is present in an amount of 0.5%, 1%, 2%, 3%, 4%, 5%, 6%, 8%, 10%, 12%, 15%, 20% or 25% by mass.
According to the present invention, the iron ion chelating agent is selected from at least one of sodium citrate, zinc gluconate, sodium benzoate, and sodium salicylate. The addition of the iron ion chelating agent sequesters absorbed iron ions in the dehydration composition and inhibits corrosion. Illustratively, the iron ion chelating agent is present in an amount of 10ppm, 20ppm, 50ppm, 100ppm, 200ppm, 500ppm, 600ppm, 700ppm, 1000ppm, 2000ppm, 3000ppm, 4000ppm, 5000ppm, 6000ppm, 8000ppm or 10000ppm by mass.
Illustratively, the iron ion chelating agent is selected from sodium citrate, the mass percentage of the sodium citrate is 10-10000ppm, preferably, the mass percentage of the sodium citrate is 10-5000ppm, and preferably, the mass percentage of the sodium citrate is 200-700 ppm.
Illustratively, the iron ion chelating agent is selected from a composition of sodium benzoate and at least one of sodium gluconate and zinc gluconate, the mass percentage content of the composition of the sodium benzoate and at least one of the sodium gluconate and the zinc gluconate is 10-10000ppm, preferably the mass percentage content of the composition of the sodium benzoate and at least one of the sodium gluconate and the zinc gluconate is 600-2000ppm, the weight ratio of the sodium benzoate and at least one of the sodium gluconate and the zinc gluconate in the composition is 0.1:1-10:1, and preferably the weight ratio of the sodium benzoate and at least one of the sodium gluconate and the zinc gluconate in the composition is 0.5:1-1: 0.5.
Illustratively, the iron ion chelating agent is selected from a composition of sodium salicylate and at least one of sodium gluconate and zinc gluconate, the mass percentage of the composition of sodium salicylate and at least one of sodium gluconate and zinc gluconate is 10-10000ppm, preferably the mass percentage of the composition of sodium salicylate and at least one of sodium gluconate and zinc gluconate is 600-2000ppm, the weight ratio of sodium salicylate and at least one of sodium gluconate and zinc gluconate in the composition is 0.1:1-10:1, and the weight ratio of sodium salicylate and at least one of sodium gluconate and zinc gluconate in the composition is 0.5:1-1: 0.5.
The composition of sodium salicylate and at least one of sodium gluconate and zinc gluconate may be, for example, a composition of sodium salicylate and sodium gluconate, a composition of sodium salicylate and zinc gluconate, or a composition of sodium salicylate, sodium gluconate and zinc gluconate.
In addition, the weight ratio of the sodium salicylate to at least one of the sodium gluconate and the zinc gluconate in the composition is 0.1:1-10:1, for example, the weight ratio of the sodium salicylate to the sodium gluconate is 0.1:1-10:1, or the weight ratio of the sodium salicylate to the zinc gluconate is 0.1:1-10:1, or the weight ratio of the sodium salicylate to the sum of the weights of the sodium gluconate and the zinc gluconate is 0.1:1-10:1, that is, the sum of the weights of the sodium gluconate and the zinc gluconate is 1, and the sodium salicylate is 0.1-10. The same applies to the composition of sodium benzoate and at least one of sodium gluconate and zinc gluconate.
According to the invention, the dehydration composition comprises the following components in parts by weight:
(1) 70-98.5% of glycol and/or glycerol; (2) alkali metal salt 0.5-10%; (3) 1-20% of alcohol amine; (4) iron ion chelating agent 50-8000 ppm; the sum of the mass percentages of the components is 100 percent.
According to the invention, the dehydration composition comprises the following components in parts by weight:
(1) 77-98.5% of glycol and/or glycerol; (2) alkali metal salt 0.5-8%; (3) 1-15% of alcohol amine; (4) iron ion chelating agent 50-5000 ppm; the sum of the mass percentages of the components is 100 percent.
According to the invention, the dehydration composition comprises the following components in parts by weight:
(1) glycol and/or glycerol, 84-93%; (2) 3-6% of alkali metal salt; (3) 4-10% of alcohol amine; (4) iron ion chelating agent 50-5000 ppm; the sum of the mass percentages of the components is 100 percent.
According to the invention, the dehydration composition further comprises the following components:
(5) a polyether polyol.
According to the invention, the dehydration composition comprises the following components in parts by weight:
(5) polyether polyol 0.05-15%.
According to the invention, the addition of said polyether polyol makes it possible to modify the volatility of the dehydration composition and to reduce the losses during the regeneration of the dehydration composition. Illustratively, the polyether polyol is present in an amount of 0.05%, 0.1%, 0.2%, 0.5%, 1%, 2%, 3%, 4%, 5%, 6%, 8%, 10%, 12% or 15% by mass.
According to the invention, the polyether polyol has a molecular weight of 200-.
According to the present invention, the polyether polyol is a polyether polyol known in the art, which can be prepared by a method known in the art, or can be obtained commercially, and illustratively, the polyether polyol can be a product obtained by ring-opening polymerization of a polyol, a polyamine or an active hydrogen-containing compound as an initiator with an alkylene oxide under the action of a catalyst. For example, the polyether polyol is a polyaddition product of glycerol and an alkylene oxide. Preferably the polyether polyol is a polyaddition product of glycerol and ethylene oxide.
The invention also provides a preparation method of the dehydration composition, which comprises the following steps:
the dehydration composition is prepared by mixing a glycol and/or glycerol, an alkali metal salt, an iron ion chelating agent, an alcohol amine, and optionally a polyether polyol.
According to the invention, the mixing is, for example, at room temperature.
The invention also provides the use of the above-mentioned dehydration composition for removing water from a system.
According to the present invention, the system may be one of an aqueous halocarbon system, an aqueous alkylene oxide system, an aqueous alkane system, an aqueous alkene system, an aqueous Volatile Organic Compounds (VOCs) containing off-gas system, and the like.
Illustratively, the system may be one of an aqueous natural gas system, an aqueous propylene oxide system, an aqueous ethylene system, an aqueous propylene system, and the like.
Illustratively, the system may be a diluent methyl chloride recovery system in slurry butyl rubber production.
According to the invention, the volatile organic compounds are chosen from organic compounds having a boiling point or initial boiling point lower than or equal to 250 ℃. Illustratively, the organic compound is selected from aliphatic hydrocarbons with the carbon number less than or equal to 12, cyclic hydrocarbons with the carbon number less than or equal to 14, aromatic hydrocarbons with the carbon number less than or equal to 14, halogenated hydrocarbons with the carbon number less than or equal to 6, ester compounds with the carbon number less than or equal to 12, ether compounds with the carbon number less than or equal to 12, nitrogen or sulfur-containing organic compounds with the carbon number less than or equal to 10, or mixtures thereof. Illustratively, the volatile organic is selected from at least one of hexane, heptane, cyclohexane, benzene, toluene, xylene, ethyl acetate, methyl tert-butyl ether, acetonitrile, and the like.
The invention also provides a dehydrating agent, which comprises the dehydrating composition.
According to the present invention, the dehydrating agent further comprises a preservative, an antioxidant, and the like.
The invention also provides a dehydration method, which comprises the following steps:
and (3) contacting the dehydration composition or the dehydration agent with a system to be dehydrated to remove the moisture in the system. The invention has the beneficial effects that:
the invention provides a dehydration composition, a preparation method and application thereof, wherein the dehydration composition can well realize dehydration treatment of a system to be treated. Furthermore, the dehydration composition can obviously inhibit the corrosion of equipment and greatly reduce the consumption of the dehydration composition in the regeneration process due to the addition of the glycol and/or the glycerol, the alkali metal salt, the iron ion chelating agent, the alcohol amine and the optional polyether polyol in the system.
Detailed Description
The preparation method of the present invention will be described in further detail with reference to specific examples. It is to be understood that the following examples are only illustrative and explanatory of the present invention and should not be construed as limiting the scope of the present invention. All the technologies realized based on the above-mentioned contents of the present invention are covered in the protection scope of the present invention.
The experimental methods used in the following examples are all conventional methods unless otherwise specified; reagents, materials and the like used in the following examples are commercially available unless otherwise specified.
Example 1 and comparative example 1
A dehydrated composition was prepared from the components shown in Table 1 below, and its dehydration ability was measured in accordance with the method of test example 1, and the corrosion of the dehydrated composition to be regenerated on iron test pieces was measured in accordance with the method of test example 2, and the results are shown in Table 2.
Polyether polyol polyether 330 is commercial HSH330 (from Jiangsu Haian petrochemical plant).
TABLE 1
＊ mixture of multicomponent chelating agents, the weight ratio of each component is 1
Test example 1
The dehydrated compositions numbered 1 to 11 in the above table 1 were contacted with a system to be tested containing water and methyl chloride (wherein, water content was 0.2 wt%, methyl chloride was 95%, and isobutylene was 4.8%), and the water content in the resulting dried gas was measured, and the results are shown in table 2, and dehydrated compositions containing methyl chloride and water were obtained.
Test example 2
And (4) detecting the corrosion rate of the test solution to iron by referring to a classical weight loss method.
20# Steel 50mm × 25mm × 2mm test piece, wiping oil with filter paper, scrubbing with absorbent cotton in n-hexane and anhydrous ethanol (50 mL of the above reagent is used for each 10 test pieces), drying with filter paper, placing in a drier for more than 4h, weighing, and recording as m0Accurate to 0.0001g, and storing in a drier for use.
Preparing 180g of dehydrated composition with numbers 1-11 and containing 3 wt% of methyl chloride and 3 wt% of water, adding the dehydrated composition into a 250ml titanium autoclave, suspending and soaking the spare No. 20 steel sheet in a solution of the autoclave, hermetically stirring and heating for 6 hours according to the temperature of a tower kettle regenerated by rectifying and dehydrating triethylene glycol, and sampling to detect the corrosion rate of the steel sheet.
Scrubbing the iron sheet after the test with a brush, soaking in an acid pickling solution (pH is 1) for 3-5min, taking out, quickly washing with tap water, immediately soaking in a sodium hydroxide solution (pH is 13) for about 30s, taking out, washing with tap water, wiping with filter paper, sucking to dry, soaking in absolute ethyl alcohol for about 3min, sucking to dry with filter paper, placing in a dryer for more than 4h, weighing, and recording as m1To the nearest 0.0001 g.
Corrosion rate x, unit millimeter per year (mm/a) calculation formula:
W：m0-m1mass loss of test piece, g;
a: surface area of test piece, cm2；
D: density of test piece in g/cm3；
T: test time of test piece, hr;
8760: hours equivalent to 1 year, hr/a;
10: mm number corresponding to 1cm, mm/cm.
TABLE 2
| Numbering | Moisture content (ppm) of dried methyl chloride | Corrosion rate mm/a |
| 1 | 50 | 9.5 |
| 2 | 51 | 2.72 |
| 3 | 52 | 2.65 |
| 4 | 57 | 1.53 |
| 5 | 55 | 0.41 |
| 6 | 56 | 0.39 |
| 7 | 60 | 0.22 |
| 8 | 55 | 0.19 |
| 9 | 56 | 0.20 |
| 10 | 31 | 0.19 |
| 11 | 39 | 0.20 |
Example 2
Aqueous methyl chloride (wherein, the water content is 0.2%, methyl chloride 95%, isobutene 4.8%) 529.2kg/hr, pressure 430kPa, temperature 22 deg.C, entering the absorption tower from the bottom of the tower, 50kg/hr number 7 dehydration composition was added to the top of the absorption tower with the number of plates 5, pressure 430kPa, temperature 22 deg.C. 484.6kg/hr of methyl chloride containing 60ppm of water was discharged from the top of the absorption column.
94.6kg/hr of dehydrated composition to be regenerated, which contains 1.1% of water and 42% of methyl chloride, is discharged from the bottom of the absorption tower. The dehydrated composition containing water and chloromethane discharged from the tower bottom is subjected to flash evaporation for methane dechlorination and rectification dehydration regeneration, the water content in the dehydrated composition is reduced to be below 0.2 percent, and the regenerated dehydrated composition is returned to the dehydration absorption tower for use. The composition of triethylene glycol in the recovered dehydration composition and the liquid level at the bottom of the absorption tower were analytically monitored, and fresh dehydration composition was replenished to the dehydration absorption tower.
After calculation, 25kg of triethylene glycol were consumed for each 100t of methyl chloride treated.
Example 3
Procedure example 2 was repeated with the difference that the dehydrated composition numbered 7 was replaced with the dehydrated composition numbered 6.
After calculation, 31kg of triethylene glycol were consumed per 100t of methyl chloride treated. As compared with example 2, the addition of the polyether component reduced the triethylene glycol consumption by 20%.
Comparative example 2
Procedure example 2 was repeated with the difference that the dehydrating composition numbered 7 was replaced with the dehydrating composition numbered 2.
After calculation, 32kg of triethylene glycol were consumed for each 100t of methyl chloride treated. With the dehydration composition of number 7, triethylene glycol loss can be reduced by 20%. If no polyether is added, the triethylene glycol loss is basically equivalent.
The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A dewatering composition, wherein the dewatering composition comprises the following components:
(1) glycols and/or glycerin; (2) an alkali metal salt; (3) an alcohol amine; and (4) iron ion chelating agents.
2. The dehydration composition according to claim 1, wherein said dehydration composition comprises the following components in mass percent:
(1) 60-99.4% of glycol and/or glycerol; (2) alkali metal salt 0.1-15%; (3) 0.5 to 25 percent of alcohol amine; (4) 10-10000ppm of iron ion chelating agent; the sum of the mass percentages of the components is 100 percent.
3. The dehydration composition of claim 1 or 2, wherein said diol is selected from at least one of the compounds represented by formula 1:
in the formula 1, n is 2 or 3, and m is an integer of 1-5. For example, m is 1, 2, 3, 4 or 5.
Preferably, the compound represented by formula 1 is ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, or tetrapropylene glycol.
Illustratively, the alkali metal salt is selected from α -sodium glycolate, lithium nitrate, sodium nitrate, potassium nitrate, cesium nitrate, rubidium chloride, lithium chloride, sodium chloride, potassium chloride, rubidium chloride, cesium chloride, lithium acetate, sodium acetate, potassium acetate, rubidium acetate, cesium acetate, and corresponding hydrates, such as sodium acetate trihydrate and the like.
Preferably, the alcohol amine is selected from at least one of triethanolamine, diethanolamine, and ethanolamine.
4. The dehydration composition according to any of claims 1-3, wherein said iron ion chelating agent is selected from at least one of sodium citrate, zinc gluconate, sodium benzoate, and sodium salicylate.
Preferably, the iron ion chelating agent is selected from sodium citrate, the mass percentage of the sodium citrate is 10-10000ppm, preferably, the mass percentage of the sodium citrate is 10-5000ppm, and preferably, the mass percentage of the sodium citrate is 200-700 ppm.
Preferably, the iron ion chelating agent is selected from a composition of sodium benzoate and at least one of sodium gluconate and zinc gluconate, the mass percentage content of the composition of the sodium benzoate and at least one of the sodium gluconate and the zinc gluconate is 10-10000ppm, preferably, the mass percentage content of the composition of the sodium benzoate and at least one of the sodium gluconate and the zinc gluconate is 600-2000ppm, the weight ratio of the sodium benzoate and at least one of the sodium gluconate and the zinc gluconate in the composition is 0.1:1-10:1, and preferably, the weight ratio of the sodium benzoate and at least one of the sodium gluconate and the zinc gluconate is 0.5:1-1: 0.5.
Preferably, the iron ion chelating agent is selected from a composition of sodium salicylate and at least one of sodium gluconate and zinc gluconate, the mass percentage of the composition of sodium salicylate and at least one of sodium gluconate and zinc gluconate is 10-10000ppm, preferably the mass percentage of the composition of sodium salicylate and at least one of sodium gluconate and zinc gluconate is 600-2000ppm, the weight ratio of sodium salicylate and at least one of sodium gluconate and zinc gluconate in the composition is 0.1:1-10:1, and the weight ratio of sodium salicylate and at least one of sodium gluconate and zinc gluconate in the composition is 0.5:1-1: 0.5.
5. The dewatering composition according to any one of claims 1-4, wherein the dewatering composition comprises the following components in the following amounts:
(1) 70-98.5% of glycol and/or glycerol; (2) alkali metal salt 0.5-10%; (3) 1-20% of alcohol amine; (4) iron ion chelating agent 50-8000 ppm; the sum of the mass percentages of the components is 100 percent.
Preferably, the dehydration composition comprises the following components in the following component content:
(1) 77-98.5% of glycol and/or glycerol; (2) alkali metal salt 0.5-8%; (3) 1-15% of alcohol amine; (4) iron ion chelating agent 50-5000 ppm; the sum of the mass percentages of the components is 100 percent.
Preferably, the dehydration composition comprises the following components in the following component content:
(1) glycol and/or glycerol, 84-93%; (2) 3-6% of alkali metal salt; (3) 4-10% of alcohol amine; (4) iron ion chelating agent 50-5000 ppm; the sum of the mass percentages of the components is 100 percent.
6. The dewatering composition of any one of claims 1-5, wherein the dewatering composition further comprises:
(5) a polyether polyol.
Preferably, the dehydration composition comprises the following components in the following component content:
(5) polyether polyol 0.05-15%.
Preferably, the polyether polyol has a molecular weight of 200-.
7. A process for the preparation of a dehydration composition according to any of claims 1-6, said process comprising the steps of:
the dehydration composition is prepared by mixing a glycol and/or glycerol, an alkali metal salt, an iron ion chelating agent, an alcohol amine, and optionally a polyether polyol.
8. Use of a dehydration composition according to any of claims 1-6 for removing water from a system.
Preferably, the system may be one of an aqueous halocarbon system, an aqueous alkylene oxide system, an aqueous alkane system, an aqueous alkene system, an aqueous Volatile Organic Compounds (VOCs) containing off-gas system, and the like.
Preferably, the system may be one of an aqueous natural gas system, an aqueous propylene oxide system, an aqueous ethylene system, an aqueous propylene system, and the like.
Preferably, the system can be a diluent methyl chloride recovery system in the production of butyl rubber by a slurry method.
9. A dewatering agent comprising a dewatering composition as claimed in any one of claims 1 to 6.
Preferably, the dehydrating agent further comprises a preservative, an antioxidant, and the like.
10. A dewatering method, comprising the steps of:
contacting a dehydrating composition according to any one of claims 1 to 6 or a dehydrating agent according to claim 9 with a system to be dehydrated to remove water from the system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910290609.XA CN111013330A (en) | 2019-04-11 | 2019-04-11 | Dehydration composition and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910290609.XA CN111013330A (en) | 2019-04-11 | 2019-04-11 | Dehydration composition and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111013330A true CN111013330A (en) | 2020-04-17 |
Family
ID=70203554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910290609.XA Pending CN111013330A (en) | 2019-04-11 | 2019-04-11 | Dehydration composition and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111013330A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5725637A (en) * | 1994-03-21 | 1998-03-10 | Gas Research Institute | Gas dehydration process |
| CN106457133A (en) * | 2014-06-20 | 2017-02-22 | 陶氏环球技术有限责任公司 | Polyhydric alcohol compositions for gas dehydration |
| CN108025250A (en) * | 2015-10-19 | 2018-05-11 | 陶氏环球技术有限责任公司 | Gas dewatering composition and method |
| CN109069987A (en) * | 2016-04-29 | 2018-12-21 | 陶氏环球技术有限责任公司 | Make the composition and method of gas dewatering using glycol, imidazolium compounds and optional additive |
-
2019
- 2019-04-11 CN CN201910290609.XA patent/CN111013330A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5725637A (en) * | 1994-03-21 | 1998-03-10 | Gas Research Institute | Gas dehydration process |
| CN106457133A (en) * | 2014-06-20 | 2017-02-22 | 陶氏环球技术有限责任公司 | Polyhydric alcohol compositions for gas dehydration |
| CN108025250A (en) * | 2015-10-19 | 2018-05-11 | 陶氏环球技术有限责任公司 | Gas dewatering composition and method |
| CN109069987A (en) * | 2016-04-29 | 2018-12-21 | 陶氏环球技术有限责任公司 | Make the composition and method of gas dewatering using glycol, imidazolium compounds and optional additive |
Non-Patent Citations (3)
| Title |
|---|
| 刘一山: "《制浆造纸助剂及其应用技术》", 31 August 2010, 中国轻工业出版社 * |
| 陆柱等: "《油田水处理技术》", 31 March 1990, 石油工业出版社 * |
| 马兴元等: "《合成革化学与工艺学》", 30 November 2015, 中国轻工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2642071C2 (en) | Aqueous alkanolamine absorbing composition containing pyperazin for improved removal of hydrogen sulphide from gaseous mixtures, and method of its use | |
| US8814989B2 (en) | Process for removing carbon dioxide (CO2) from a cycle gas system | |
| JP3529855B2 (en) | Method for treating carbon dioxide in gas to be treated and absorption liquid | |
| EP2809426B1 (en) | A process for controlling the emission of flue gases | |
| JPS6345243B2 (en) | ||
| CN103949147B (en) | A kind of sulfur method for gas cleaning | |
| JPH01123615A (en) | Acidic gas absorbent composition | |
| US9561466B2 (en) | Process for controlling the emission of flue gases | |
| KR20150044856A (en) | An absorbent composition for the selective absorption of hydrogen sulfide and a process of use thereof | |
| Bai et al. | Catalytic oxidation of 1, 2-dichloroethane over Al 2 O 3–CeO 2 catalysts: combined effects of acid and redox properties | |
| PL100734B1 (en) | METHOD OF DETERMINATION AND PURIFICATION OF ETHYLENE OXIDE | |
| WO2011036171A1 (en) | Carbon dioxide absorbent | |
| CN111013330A (en) | Dehydration composition and preparation method and application thereof | |
| JP6546708B1 (en) | Method for producing acetic acid | |
| US20070060703A1 (en) | Method for producing (meth)acrylic acid derivative | |
| CN102179147B (en) | Polymer organic amine desulfurizer | |
| CN111018660A (en) | Separation method of chloromethane material | |
| KR102096862B1 (en) | Method for Regenerating of Absorbents for Acidic Gas Removal using Transition Metal oxide catalyst | |
| CN102992965B (en) | A kind of preparation method of methyl tertiary butyl ether | |
| WO2021117912A1 (en) | Distillation regeneration method of amine-based carbon dioxide absorbent using metal oxide catalyst | |
| CN106310879A (en) | Method for treating exhaust gas containing ethylene oxide and propylene oxide | |
| CN103449959A (en) | Preparation method of ultra-pure 1,1,1,2,3,3,3-heptafluoropropane | |
| CN111013333B (en) | Method for treating hydrogen sulfide in waste gas generated in viscose fiber production | |
| Pearson | Alumina catalysts in low-temperature Claus process | |
| CN114682213A (en) | Flame-retardant activated carbon for adsorbing ammonia gas and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200417 |