CN110857226A - Combined method for treating wastewater from propylene oxide production and desalting crude oil - Google Patents
Combined method for treating wastewater from propylene oxide production and desalting crude oil Download PDFInfo
- Publication number
- CN110857226A CN110857226A CN201810968077.6A CN201810968077A CN110857226A CN 110857226 A CN110857226 A CN 110857226A CN 201810968077 A CN201810968077 A CN 201810968077A CN 110857226 A CN110857226 A CN 110857226A
- Authority
- CN
- China
- Prior art keywords
- propylene oxide
- wastewater
- desalting
- oxide production
- oil
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G33/00—Dewatering or demulsification of hydrocarbon oils
- C10G33/04—Dewatering or demulsification of hydrocarbon oils with chemical means
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Epoxy Compounds (AREA)
Abstract
The invention relates to the field of wastewater treatment and crude oil desalting, in particular to a combined method for treating wastewater in propylene oxide production and desalting crude oil. The method comprises the following steps: mixing the propylene oxide production wastewater serving as desalted water injection with raw oil and a demulsifier to ensure that organic matters in the propylene oxide production wastewater enter the raw oil and salts in the raw oil enter the propylene oxide production wastewater; and then performing demulsification treatment on the mixture obtained by mixing. According to the method, the waste water generated in the production of the propylene oxide is directly used as the desalting water injection for desalting the crude oil, so that a better desalting effect can be achieved, and the quality of the raw oil is improved; but also can reduce the COD value of the waste water of the production of the oxygen propane and lighten the pressure of the subsequent sewage treatment.
Description
Technical Field
The invention relates to the field of wastewater treatment and crude oil desalting, in particular to a combined method for treating wastewater in propylene oxide production and desalting crude oil.
Background
Propylene oxide is an important organic chemical product in petrochemical production, is one of the most important intermediate products in fine chemical engineering, and is widely used for preparing polyether and polyurethane. The traditional production process of the propylene oxide mainly comprises a chlorohydrin method and an oxidation method, and has the defects of environmental pollution, equipment corrosion, large amount of byproducts, long process and large equipment investment. The current preparation of propylene oxide by epoxidation of propylene and hydrogen peroxide is a hot spot of domestic and overseas research, and has the advantages of low pollution, and high COD (chemical oxygen demand) caused by the fact that a part of organic matters such as alcohol, ether and the like are still contained in wastewater although a main byproduct is water. The existing method for treating the wastewater obtained by preparing the propylene oxide from the propylene-hydrogen peroxide is mainly a Fenton method, and the Fenton method mainly uses a high-grade oxidant H2O2And Fe2+Oxidizing organic matter macromolecules into biochemical micromolecules or H2O、CO2、N2The treatment method has the defects that the COD of the effluent is still high, the fluctuation is large, the index requirement of a wastewater treatment plant is difficult to meet, the cost of the treatment agent is high, and the waste of resources is caused.
Disclosure of Invention
The invention aims to provide a combined method for treating propylene oxide production wastewater and desalting crude oil, which can effectively utilize the propylene oxide production wastewater, is not only beneficial to better desalting the crude oil, but also can reduce the COD of the wastewater.
In order to achieve the above objects, one aspect of the present invention provides an integrated process for treating wastewater from propylene oxide production and desalting crude oil, the process comprising: mixing the propylene oxide production wastewater serving as desalted water injection with raw oil and a demulsifier to ensure that organic matters in the propylene oxide production wastewater enter the raw oil and salts in the raw oil enter the propylene oxide production wastewater; and then performing demulsification treatment on the mixture obtained by mixing.
According to the method, the waste water generated in the production of the propylene oxide is directly used as the desalting water injection for desalting the crude oil, so that a better desalting effect can be achieved, and the quality of the raw oil is improved; but also can reduce the COD value of the waste water of the production of the oxygen propane and lighten the pressure of the subsequent sewage treatment; the method has the advantages of cheap and easily obtained raw materials, realization of cyclic utilization of resources, good industrial prospect and obvious economic benefit.
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
The invention provides a combined method for treating wastewater generated in propylene oxide production and desalting crude oil, which comprises the following steps: mixing the propylene oxide production wastewater serving as desalted water injection with raw oil and a demulsifier to ensure that organic matters in the propylene oxide production wastewater enter the raw oil and salts in the raw oil enter the propylene oxide production wastewater; and then performing demulsification treatment on the mixture obtained by mixing.
According to the invention, the method combines the treatment of the epoxy propane production wastewater with the crude oil desalting, and uses the epoxy propane production wastewater as desalting and water injection for raw oil desalting, and the epoxy propane production wastewater can be used as the desalting and water injection to obtain the desalting and demulsifying effect equivalent to that of distilled water; the demulsification of the raw oil can be realized under the condition of lower dosage of the demulsifier; on the other hand, the COD of the propylene oxide production wastewater is also reduced, and the dual effects of the treatment of the propylene oxide production wastewater and the crude oil desalting are realized.
According to the invention, the propylene oxide production wastewater can be wastewater generated in preparation of propylene oxide by epoxidation of propylene and hydrogen peroxide, which contains a large amount of water and a certain amount of organic matter, by using a titanium silicalite molecular sieve as a catalyst, so that the propylene oxide production wastewater has a higher COD value, for example, the COD of the propylene oxide production wastewater can be 40000-400000mg/L, usually 100000-350000mg/L, and a higher pressure is applied to the treatment of the propylene oxide production wastewater. Wherein, in general, the organic matter contained in the propylene oxide production wastewater is one or more of propylene glycol, propylene glycol monomethyl ether, 2-methoxy-1-propanol, -propylene glycol and-propylene glycol monomethyl ether. The content of the organic substance may be, for example, 1 to 20% by weight, preferably 2 to 5% by weight. Specifically, in the above propylene oxide production wastewater, the content of propylene glycol monomethyl ether may be, for example, 3 to 20% by weight, usually 3.5 to 10% by weight, the content of 2-methoxy-1-propanol may be, for example, 0.2 to 8% by weight, usually 0.5 to 1% by weight, and the content of propylene glycol may be, for example, 0.1 to 2% by weight.
According to the present invention, the method of the present invention can be applied to the treatment of various feedstocks, particularly to the treatment of feedstocks having a salt content of 1 to 1000mg/kg, preferably 10 to 900mg/kg, more preferably 20 to 800mg/kg, and still more preferably 40 to 750mg/kg, particularly feedstocks having a relatively low salt content, for example, feedstocks having a salt content of 1 to 500mg/kg, preferably 10 to 200mg/kg, and more preferably 20 to 100 mg/kg. The feedstock oil may also have a certain water content, for example, a water content of 0 to 5 wt.%, preferably 0.3 to 4.5 wt.%, for example, 0.3 to 4 wt.%, 0.4 to 0.8 wt.%, 1 to 3.5 wt.%, 2 to 5 wt.%, etc. Specific examples of the raw oil may include, for example, one or more of crude oil, distillate oil, vacuum residue, deasphalted oil, and the like.
According to the present invention, the amount of the propylene oxide production wastewater used relative to the feed oil may vary within a wide range, and preferably, the amount of the propylene oxide production wastewater used may be 1 to 50 parts by weight relative to 100 parts by weight of the feed oil. From the viewpoint of facilitating separation of salts and water in the oil phase and further improving the removal rate of COD in the water phase, the amount of the propylene oxide production wastewater to be used is more preferably 3 to 30 parts by weight, still more preferably 5 to 20 parts by weight, particularly preferably 5 to 15 parts by weight or 10 to 15 parts by weight, relative to 100 parts by weight of the feedstock oil.
According to the invention, the dosage of the demulsifier can vary in a wide range, and preferably, the dosage of the demulsifier can be 1-200 mug, preferably 10-150 mug, relative to 1g of raw oil. According to the method, good demulsification effect can be obtained even at low dosage of the demulsifier. According to the method of the present invention, the amount of the demulsifier to be used is more preferably 20 to 120. mu.g, still more preferably 30 to 100. mu.g, and may be, for example, 30 to 50. mu.g, 60 to 100. mu.g, 80 to 120. mu.g, or the like, relative to 1g of the feedstock oil.
The type of the demulsifier is not particularly limited in the present invention, and may be selected conventionally according to the type of the feedstock oil, and for example, the demulsifier may be one or more of an anionic demulsifier, a cationic demulsifier, a nonionic demulsifier, and an amphoteric demulsifier. The demulsifier can be a demulsifier which is purchased from a factory selling raw oil and is used as a matched product, and can be a single demulsifier or a composite demulsifier. Specific examples of the demulsifier may include, for example: for example, the demulsifier may be one or more of a demulsifier BSA687 available from Shandong Binshiking chemical company Limited, a demulsifier BP-2070 available from Nanjing Hande chemical company Limited, a demulsifier TA1031 available from Longhua petrochemical company Limited, Jingzhou, a demulsifier SP169 available from Jihua Liaoyuan chemical company Limited, and the like.
According to the invention, before the propylene oxide production wastewater is mixed with the raw oil and the demulsifier, the raw oil is preferably preheated, preferably to 50-100 ℃, preferably 70-98 ℃, more preferably 80-95 ℃, for example 85-95 ℃.
According to the present invention, the mixing of the propylene oxide production wastewater with the raw oil and the demulsifier may be a one-step mixing or a multi-step mixing, and the present invention is not particularly limited to this, and for convenience, the propylene oxide production wastewater may be mixed with the raw oil and the demulsifier in one step to obtain an oil-water mixture. The mixing conditions preferably include: the temperature is 10-95 ℃, the rotating speed is 1000-. Preferably, the conditions of the mixing include: the temperature is 30-70 ℃, the rotating speed is 5000-. The mixing can be performed in any feasible mixing device, such as an in-line mixer, a mixing valve, a mixing tank, a stirrer, a homogenizer, an electro-desalting device, counter-current extraction, and the like.
According to the present invention, the demulsification treatment of the mixture obtained by mixing may be performed in various manners as long as oil and water can be separated, and examples thereof include centrifugation, heating, and applying an electric field.
In a preferred embodiment of the present invention, the demulsification treatment is a static demulsification mode, and the conditions of the static demulsification comprise: the temperature is 50-100 deg.C, and the time is 30min-24 h. Preferably, the conditions of standing demulsification include: the temperature is 70-90 deg.C, preferably 75-85 deg.C, and the time is 60-200min (preferably 80-180 min).
In another preferred embodiment of the present invention, the demulsification treatment is an electric desalting demulsification mode, and the conditions of the electric desalting demulsification include: the temperature is 80-150 ℃, the time is 10-100min, and the electric field intensity is 200-300V/cm. Preferably, the conditions for demulsification by electric desalting comprise: the temperature is 110-: at the temperature of 120-140 ℃, the time is 50-80min, and the electric field intensity is 220-280V/cm.
The method of the invention uses the propylene oxide production wastewater as the desalination water injection, not only has better desalination effect, greatly improves the quality of the raw oil, but also has cheap and easily obtained raw materials, realizes the recycling of resources, and has good industrialization prospect and obvious economic benefit. In addition, after the propylene oxide wastewater is treated by the raw oil, the COD can be obviously reduced, the pressure of subsequent sewage treatment is reduced, and the method has good social benefit.
The present invention will be described in detail below by way of examples.
In the following examples:
in the propylene oxide production wastewater, the water content was 95.62 wt%, the propylene glycol monomethyl ether content was 3.77 wt%, the 2-methoxy-1-propanol content was 0.61 wt%, and the COD was 224887 mg/L.
Feed oil No. 1 was swallowed redistilled crude oil, and had a salt content of 51.9mg/kg and a water content of 0.5 wt%.
Raw material oil No. 2 is Liaohe crude oil, the salt content is 728mg/kg, and the water content is 3.1 weight percent.
The salt content was measured according to the method in Standard SY/T0536-2008.
The water content is measured according to the method in the standard GB/T8929-2006.
Example 1
This example illustrates the integrated process of the present invention for the treatment of wastewater from the production of propylene oxide and the desalting of crude oil.
Preheating raw oil No. 1 to 85 ℃, adding propylene oxide production wastewater (the amount of the propylene oxide production wastewater is 20 parts by weight relative to 100 parts by weight of the raw oil) and a demulsifier BSA687 (the amount of the propylene oxide production wastewater is 30 mu g relative to 1g of the raw oil; purchased from Shandong Binshizu company, Ltd., the same below), mixing the mixture in a mixing device at 8000rpm and room temperature (25 ℃) for 30s, adding the obtained oil-water mixture into a water separating bottle, placing the water separating bottle into a constant-temperature water bath at 80 ℃, demulsifying and separating water, and recording the water separating amount at different times, wherein the results are shown in Table 1; taking a sample of the oil phase after 150min, measuring the salt content and the water content, and the results are shown in Table 2; the reduction rate of COD in the propylene oxide wastewater was calculated by taking a sample of the aqueous phase after 150min, and the results are shown in Table 2.
Comparative example 1
The process of example 1 was followed except that distilled water was used in place of propylene oxide production wastewater and the amount of water split was recorded at different times, and the results are shown in Table 1; a sample of the oil phase after 150min was taken and the salt content and water content were measured and the results are shown in Table 2.
Example 2
This example illustrates the integrated process of the present invention for the treatment of wastewater from the production of propylene oxide and the desalting of crude oil.
Preheating raw oil No. 1 to 95 ℃, adding propylene oxide production wastewater (the using amount of the propylene oxide production wastewater is 15 parts by weight relative to 100 parts by weight of the raw oil) and a demulsifier BP2070 (the using amount is 40 mu g relative to 1g of the raw oil; purchased from Nanjing Han Germany chemical industry Co., Ltd., the same below), mixing the mixture for 20s at the room temperature (25 ℃) at the rotating speed of 7000rpm in a mixing device, adding the obtained oil-water mixture into a water separating bottle, placing the water separating bottle into a constant-temperature water bath at 85 ℃, demulsifying and separating water, and recording the water separating amount at different times, wherein the results are shown in Table 1; taking a sample of the oil phase after 150min, measuring the salt content and the water content, and the results are shown in Table 2; the reduction rate of COD in the propylene oxide wastewater was calculated by taking a sample of the aqueous phase after 150min, and the results are shown in Table 2.
Example 3
This example illustrates the integrated process of the present invention for the treatment of wastewater from the production of propylene oxide and the desalting of crude oil.
According to the method described in example 1, except that the amount of the demulsifier BSA687 used was 150. mu.g relative to 1g of the feed oil; the water split at different times was recorded and the results are shown in table 1; taking a sample of the oil phase after 150min, measuring the salt content and the water content, and the results are shown in Table 2; the reduction rate of COD in the propylene oxide wastewater was calculated by taking a sample of the aqueous phase after 150min, and the results are shown in Table 2.
Example 4
This example illustrates the integrated process of the present invention for the treatment of wastewater from the production of propylene oxide and the desalting of crude oil.
The process as described in example 1, except that the propylene oxide production wastewater was used in an amount of 2 parts by weight per 100 parts by weight of the feed oil; recording water distribution amount at different time, taking a sample of the oil phase after 150min, and measuring salt content and water content, wherein the results are shown in table 2; the reduction rate of COD in the propylene oxide wastewater was calculated by taking a sample of the aqueous phase after 150min, and the results are shown in Table 2.
Example 5
This example illustrates the integrated process of the present invention for the treatment of wastewater from the production of propylene oxide and the desalting of crude oil.
The process as described in example 1, except that 50 parts by weight of the propylene oxide production wastewater was used per 100 parts by weight of the feed oil; recording water distribution amount at different time, taking a sample of the oil phase after 150min, and measuring salt content and water content, wherein the results are shown in table 2; the reduction rate of COD in the propylene oxide wastewater was calculated by taking a sample of the aqueous phase after 150min, and the results are shown in Table 2.
TABLE 1
TABLE 2
Example 6
This example illustrates the integrated process of the present invention for the treatment of wastewater from the production of propylene oxide and the desalting of crude oil.
Preheating raw oil No. 2 to 95 ℃, adding propylene oxide production wastewater (the dosage of the propylene oxide production wastewater is 5 parts by weight relative to 100 parts by weight of raw oil) and a demulsifier TA1031 (the dosage of the demulsifier TA1031 is 100 mu g relative to 1g of raw oil; purchased from Longhua petrochemical Co., Ltd., Jingzhou, the same below), mixing for 40s at the rotating speed of 5000rpm in a mixing device, adding the obtained oil-water mixture into a desalting tank, and performing electric desalting and dewatering treatment at the temperature of 120 ℃, the electric field intensity of 250V/cm and the electric field adding time of 60 min; the salt content and water content of the resulting oil phase were measured and the results are shown in Table 3, and the COD of the aqueous phase was measured to calculate the reduction rate of COD in the propylene oxide wastewater and the results are shown in Table 3.
Example 7
This example illustrates the integrated process of the present invention for the treatment of wastewater from the production of propylene oxide and the desalting of crude oil.
The process of example 6, except that the temperature for the electro-desalting and dewatering was 140 ℃; the salt content and water content of the resulting oil phase were measured and the results are shown in Table 3, and the COD of the aqueous phase was measured to calculate the reduction rate of COD in the propylene oxide wastewater and the results are shown in Table 3.
Comparative example 2
The process of example 6 was followed except that distilled water was used in equal parts by weight instead of propylene oxide production wastewater; the salt content and water content of the resulting oil phase were measured and the results are shown in Table 3.
Comparative example 3
The process of example 7, except that distilled water was used in equal parts by weight instead of propylene oxide production wastewater; the salt content and water content of the resulting oil phase were measured and the results are shown in Table 3.
TABLE 3
The test results show that the method directly uses the waste water from the production of the oxypropylene as the desalting water injection for the crude oil desalting, so that the better desalting effect can be achieved, and the quality of the raw oil is improved; but also can reduce the COD value of the waste water of the production of the oxygen propane and lighten the pressure of the subsequent sewage treatment.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (10)
1. An integrated process for the treatment of wastewater from the production of propylene oxide and the desalting of crude oil, the process comprising: mixing the propylene oxide production wastewater serving as desalted water injection with raw oil and a demulsifier to ensure that organic matters in the propylene oxide production wastewater enter the raw oil and salts in the raw oil enter the propylene oxide production wastewater; and then performing demulsification treatment on the mixture obtained by mixing.
2. The process according to claim 1, wherein the propylene oxide production wastewater is used in an amount of 1 to 50 parts by weight, preferably 3 to 30 parts by weight, relative to 100 parts by weight of the raw oil.
3. The method according to claim 1 or 2, wherein the demulsifier is used in an amount of 1-200 μ g, preferably 10-150 μ g, more preferably 20-120 μ g, relative to 1g of the raw oil.
4. The method of any one of claims 1-3, wherein the demulsification treatment is a static demulsification mode, and the conditions of the static demulsification comprise: the temperature is 50-100 ℃, and the time is 30min-24 h;
preferably, the conditions of standing demulsification include: the temperature is 70-90 deg.C, and the time is 60-200 min.
5. The method of any one of claims 1-3, wherein the demulsification treatment is a means of electro-desalting demulsification under conditions comprising: the temperature is 80-150 ℃, the time is 10-100min, and the electric field intensity is 200-;
preferably, the conditions for demulsification by electric desalting comprise: the temperature is 110-140 ℃, the time is 50-80min, and the electric field intensity is 220-280V/cm.
6. The method as claimed in any one of claims 1 to 5, wherein the COD of the wastewater from the production of propylene oxide is 40000-400000 mg/L.
7. The method according to any one of claims 1 to 6, wherein the organic matter contained in the propylene oxide production wastewater is one or more of propylene glycol, propylene glycol monomethyl ether, 2-methoxy-1-propanol, -propylene glycol and-propylene glycol monomethyl ether.
8. The process according to any one of claims 1 to 7, wherein the organic content in the propylene oxide production wastewater is from 1 to 20% by weight, preferably from 2 to 5% by weight.
9. The method according to any one of claims 1 to 8, wherein the content of salt in the raw oil is 1 to 1000mg/kg, preferably 10 to 900 mg/kg.
10. The method according to claim 9, wherein the water content in the feedstock oil is 0 to 5 wt%, preferably 0.3 to 4.5 wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810968077.6A CN110857226A (en) | 2018-08-23 | 2018-08-23 | Combined method for treating wastewater from propylene oxide production and desalting crude oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810968077.6A CN110857226A (en) | 2018-08-23 | 2018-08-23 | Combined method for treating wastewater from propylene oxide production and desalting crude oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110857226A true CN110857226A (en) | 2020-03-03 |
Family
ID=69635341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810968077.6A Pending CN110857226A (en) | 2018-08-23 | 2018-08-23 | Combined method for treating wastewater from propylene oxide production and desalting crude oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110857226A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1346030A (en) * | 1971-05-14 | 1974-02-06 | Daikyo Oil Co Ltd | Process for treating waste water effluent having odours |
| CN101372367A (en) * | 2007-08-22 | 2009-02-25 | 中国石油化工股份有限公司 | Comprehensive utilization method of PTA production waste water |
| CN206298529U (en) * | 2016-12-23 | 2017-07-04 | 胜帮科技股份有限公司 | A kind of system of separation water and propylene glycol monomethyl ether |
| CN108298618A (en) * | 2018-02-28 | 2018-07-20 | 中国天辰工程有限公司 | A kind of method and separator of epoxy propane waste water pretreatment and separation |
-
2018
- 2018-08-23 CN CN201810968077.6A patent/CN110857226A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1346030A (en) * | 1971-05-14 | 1974-02-06 | Daikyo Oil Co Ltd | Process for treating waste water effluent having odours |
| CN101372367A (en) * | 2007-08-22 | 2009-02-25 | 中国石油化工股份有限公司 | Comprehensive utilization method of PTA production waste water |
| CN206298529U (en) * | 2016-12-23 | 2017-07-04 | 胜帮科技股份有限公司 | A kind of system of separation water and propylene glycol monomethyl ether |
| CN108298618A (en) * | 2018-02-28 | 2018-07-20 | 中国天辰工程有限公司 | A kind of method and separator of epoxy propane waste water pretreatment and separation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101012169A (en) | Process for producing nitrobenzene | |
| US10710004B2 (en) | Waste stream upgrading in a propylene oxide/styrene coproduction process | |
| CN105316018B (en) | A kind of coal tar deep processing preprocess method | |
| EP2277834B1 (en) | Revaluation of aqueous waste streams generated in the propylene oxide and styrene co-production process | |
| CN102492458A (en) | Additive for removing organochlorine from crude oil and removal technology thereof | |
| CN110563253A (en) | treatment method of anisole organic wastewater | |
| JP2019500447A (en) | Method for producing high quality feedstock for steam cracking process | |
| CN110857226A (en) | Combined method for treating wastewater from propylene oxide production and desalting crude oil | |
| CN107129019B (en) | Treatment method of phenol-containing wastewater | |
| CN105623698A (en) | Coal tar pretreatment method | |
| Urbanowska et al. | Characteristics of natural organic matter removed from water along with its treatment | |
| CN108822885A (en) | A kind of composite extractant and preparation method thereof for Fischer-Tropsch oil oxide removal | |
| CN111995152A (en) | Method for treating high-concentration wastewater generated in synthesis of anisole from methyl sodium sulfate waste residue | |
| US20070284310A1 (en) | Method and system for purifying ethanol | |
| CN101372367B (en) | Comprehensive utilization method of PTA production waste water | |
| CN1235843C (en) | Method for eliminating and reclaiming acid component from oil products | |
| CN111500316B (en) | Method for preparing heavy aromatic hydrocarbon by extractive distillation | |
| JPH0247191A (en) | Manufacture of aromatic condensate suitable for use as ingredient of caburetor fuel | |
| CN104129827A (en) | Method for treating high concentration phenolic wastewater | |
| ES225871A1 (en) | Hydrocarbon conversion process | |
| CN107603654A (en) | The process for demetalizating of coal tar and the catalytic hydrogenation method of coal tar and system | |
| CN112391186A (en) | Method for separating phenolic compounds from coal tar | |
| CA1184948A (en) | Producing solvent-grade methyl-naphthalene | |
| CN110857234A (en) | Method for treating wastewater from propylene oxide production | |
| CN107243357A (en) | A kind of composite metal catalyst and its production and use |
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 |