CN101875593B - Process for refining para-xylene and extracting styrene from para-xylene - Google Patents
Process for refining para-xylene and extracting styrene from para-xylene Download PDFInfo
- Publication number
- CN101875593B CN101875593B CN 201010223539 CN201010223539A CN101875593B CN 101875593 B CN101875593 B CN 101875593B CN 201010223539 CN201010223539 CN 201010223539 CN 201010223539 A CN201010223539 A CN 201010223539A CN 101875593 B CN101875593 B CN 101875593B
- Authority
- CN
- China
- Prior art keywords
- xylene
- refining
- extractive distillation
- tower
- distillation column
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The invention relates to a process for refining para-xylene and extracting styrene from the para-xylene. The process comprises the following steps of: (1), extractive distillation; and (2), regeneration of an extracting agent. Through the process, a crude styrene product can be obtained; the styrene and other polar impurities can be removed from the xylene; and the problems of styrene polymerization, stability and chromaticity of the xylene, and the like in the para-xylene are solved. The process of the invention has the advantages of simple process flow, no waste discharged in the whole process, no environmental pollution, low material corrosion to equipment, low cost, high yield and wide application prospect.
Description
Technical field
The invention belongs to chemical field, relate to the coked crude benzene refining technology, especially a kind of refining reaching of coking xylene therefrom extracted cinnamic technique.
Background technology
The traditional diamond-making technique of crude benzol mainly is acid wash and shortening method, and industrialized extraction fractional distillation in recent years.One contains the vinylbenzene about 1% in crude benzol, take the crude benzol source mill of 50,000 tons of the previous annual outputs of order as example, if can be with the vinylbenzene that reclaims wherein, but about 5,000,000 yuan of year new output values.But the acid wash and the shortening method that extensively adopt at present all can be destroyed the vinylbenzene in the crude benzol, cause thus huge waste.In addition, in the existing coking xylene process for refining, the problems such as colourity that styrene polymerization causes is defective occur easily,
By retrieval, not yet find to relate to the extracting rectifying process for refining of coking xylene.
Summary of the invention
The object of the invention is to remedy the weak point of existing crude benzene refining technology, provide refining the reaching of a kind of coking xylene therefrom to extract cinnamic technique, this technique is therefrom extracted vinylbenzene simultaneously by the refining coking xylene of the method for extracting rectifying.
The objective of the invention is to be achieved through the following technical solutions:
A kind of refining reaching of coking xylene therefrom extracted cinnamic technique, and its processing step is:
(1) extracting rectifying:
Coking xylene enters extractive distillation column middle part, and extraction agent is from the charging of extractive distillation column middle and upper part, decompressing and continuous rectifying, working pressure 0.01mpa, 69.8 ℃ of tower top temperatures, cat head obtain containing vinylbenzene and are not more than 0.05% xylol, and the tower reactor material enters extractant regeneration tower middle part;
(2) extractant regeneration:
Material from the extractive distillation column tower reactor enters extractant regeneration tower middle part, decompressing and continuous rectifying, working pressure 0.01mpa, 75.1 ℃ of tower top temperatures, cat head obtains the crude styrene of purity 90～99%, and the tower reactor completely extraction agent that obtains regenerating returns the extractive distillation column middle and upper part and continues to use.
And in the described extracting rectifying work step, the extraction agent internal circulating load is 1-20 times of material quantity.
And, described extraction agent comprises the mixture of following one or more materials: alpha-pyrrolidone, ethylene glycol, N, dinethylformamide, N, N one N,N-DIMETHYLACETAMIDE, tetramethylene sulfone, N-Methyl pyrrolidone, dimethyl sulfoxide (DMSO), N-formyl beautiful jade, glycol ether, triglycol, gamma-butyrolactone, monoethanolamine and composition thereof.
Advantage of the present invention and beneficial effect are:
1, the designed special-purpose extraction rectification technique of the present invention both can obtain styrene product, can remove again the vinylbenzene in the dimethylbenzene, solved coking xylene because the problems such as jaundice that styrene polymerization causes.
2, technical process of the present invention is simple, and no waste discharging in whole process, does not have problem of environmental pollution, and material is little to equipment corrosion, and cost is low, has a extensive future.
Description of drawings
Fig. 1 is that abstraction distillation system of the present invention consists of synoptic diagram.
Embodiment
Below in conjunction with embodiment, the present invention is further described; Following embodiment is illustrative, is not determinate, can not limit protection scope of the present invention with following embodiment.
The process system that the present invention relates to mainly is comprised of extractive distillation column, two towers of extractant regeneration tower.
Extraction agent used in the present invention comprises the mixture of following one or more materials: alpha-pyrrolidone, ethylene glycol, N, dinethylformamide, N, N one N,N-DIMETHYLACETAMIDE, tetramethylene sulfone, N-Methyl pyrrolidone, dimethyl sulfoxide (DMSO), N-formyl beautiful jade, glycol ether, triglycol, gamma-butyrolactone, monoethanolamine and composition thereof etc.
Embodiment 1:
A kind of coking xylene is refining and therefrom extract cinnamic technique, and step is:
(1) extracting rectifying: in extractive distillation column, carry out.
The coking xylene that contains vinylbenzene 13.7% enters the extractive distillation column middle part, extraction agent N-formyl beautiful jade is from the charging of extractive distillation column middle and upper part, this extraction agent internal circulating load is 6 times of material quantities, cat head working pressure 0.01mpa, 69.8 ℃ of tower top temperatures, cat head obtains containing the xylol of the about 10ppm of vinylbenzene, and the tower reactor material enters extractant regeneration tower middle part;
(2) extractant regeneration: in the extractant regeneration tower, carry out.
Material from the extractive distillation column tower reactor enters extractant regeneration tower middle part, cat head working pressure 0.01mpa, 75.1 ℃ of tower top temperatures, cat head obtains the vinylbenzene of purity 99.4%, the tower reactor completely extraction agent N-formyl beautiful jade that obtains regenerating returns the extractive distillation column middle and upper part and continues to use.
Embodiment 2:
(1) extracting rectifying: in extractive distillation column, carry out.
The coking xylene that contains vinylbenzene 30% enters this tower middle part, the extraction agent tetramethylene sulfone is from the charging of tower middle and upper part, this extraction agent internal circulating load is 8 times of material quantities, cat head working pressure 0.01mpa, 69.8 ℃ of tower top temperatures, cat head obtains containing the xylol of vinylbenzene 22ppm, and the tower reactor material enters extractant regeneration tower middle part;
(2) extractant regeneration: in the extractant regeneration tower, carry out.
Material from the extractive distillation column tower reactor enters this tower middle part, cat head working pressure 0.01mpa, 75.1 ℃ of tower top temperatures, cat head obtains the vinylbenzene of purity 99.4%, the tower reactor completely extraction agent tetramethylene sulfone that obtains regenerating returns the extractive distillation column middle and upper part and continues to use.
The present invention is not described in detail part and is prior art.
Claims (3)
1. refining the reaching of a coking xylene therefrom extracted cinnamic technique, and it is characterized in that: its processing step is:
⑴ extracting rectifying:
Coking xylene enters extractive distillation column middle part, and extraction agent is from the charging of extractive distillation column middle and upper part, decompressing and continuous rectifying, working pressure 0.01MPa, 69.8 ℃ of tower top temperatures, cat head obtain containing vinylbenzene and are not more than 0.05% xylol, and the tower reactor material enters extractant regeneration tower middle part;
⑵ extractant regeneration:
Material from the extractive distillation column tower reactor enters extractant regeneration tower middle part, decompressing and continuous rectifying, working pressure 0.01MPa, 75.1 ℃ of tower top temperatures, cat head obtains the crude styrene of purity 90 ~ 99%, and the tower reactor completely extraction agent that obtains regenerating returns the extractive distillation column middle and upper part and continues to use.
2. refining the reaching of coking xylene according to claim 1 therefrom extracted cinnamic technique, and it is characterized in that: in the described extraction rectification technique step, the extraction agent internal circulating load is 1-20 times of material quantity.
3. refining the reaching of coking xylene according to claim 1 therefrom extracted cinnamic technique, it is characterized in that: described extraction agent comprises the mixture of following one or more materials: alpha-pyrrolidone, ethylene glycol, N, dinethylformamide, N, N one N,N-DIMETHYLACETAMIDE, tetramethylene sulfone, N-Methyl pyrrolidone, dimethyl sulfoxide (DMSO), N-formyl beautiful jade, glycol ether, triglycol, gamma-butyrolactone, monoethanolamine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010223539 CN101875593B (en) | 2010-07-12 | 2010-07-12 | Process for refining para-xylene and extracting styrene from para-xylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010223539 CN101875593B (en) | 2010-07-12 | 2010-07-12 | Process for refining para-xylene and extracting styrene from para-xylene |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101875593A CN101875593A (en) | 2010-11-03 |
| CN101875593B true CN101875593B (en) | 2013-02-27 |
Family
ID=43018289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010223539 Expired - Fee Related CN101875593B (en) | 2010-07-12 | 2010-07-12 | Process for refining para-xylene and extracting styrene from para-xylene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101875593B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102058993B (en) * | 2010-12-01 | 2013-02-27 | 天津凯赛特科技有限公司 | Extractive rectification system for coked pure benzene or pure benzene containing sulfur and refining method thereof |
| CN102166428B (en) * | 2011-03-02 | 2013-06-19 | 天津凯赛特科技有限公司 | Extractive distillation system for sulfur-containing toluene and refining method thereof |
| CN102432423B (en) * | 2011-12-14 | 2014-01-01 | 西南化工研究设计院 | Method for refining crude dimethylbenzenes by extraction and rectification |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671225A (en) * | 2009-09-18 | 2010-03-17 | 天津凯赛特科技有限公司 | Method and equipment thereof for rectifying methylbenzene |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083819C (en) * | 1999-06-11 | 2002-05-01 | 中国石油化工集团公司 | Method for separating arene by using extraction and rectification |
| CN1319918C (en) * | 2005-05-09 | 2007-06-06 | 天津大学 | Method for refining environmental protection type carbonized benzene |
-
2010
- 2010-07-12 CN CN 201010223539 patent/CN101875593B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671225A (en) * | 2009-09-18 | 2010-03-17 | 天津凯赛特科技有限公司 | Method and equipment thereof for rectifying methylbenzene |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101875593A (en) | 2010-11-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103936646B (en) | The recovery method of a kind of N-Methyl pyrrolidone | |
| CN103520945B (en) | The refining plant of crude benzole hydrogenation product and method | |
| CN103265401A (en) | Method for recovering coal-to-glycol technology byproduct raffinate | |
| CN103992202B (en) | A kind of methyl tertiary butyl ether cracking is for the system and method for high-purity iso-butylene | |
| CN103664480A (en) | Method for refining petrobenzene and thiophene by using ionic liquid complex solvent | |
| CN101875593B (en) | Process for refining para-xylene and extracting styrene from para-xylene | |
| CN102816178B (en) | A kind of method and special purpose device thereof being separated trimethyl borate and carbinol mixture | |
| CN103772145A (en) | Separation method used for preparing isopropanol via hydrogenation of acetone | |
| CN103496757A (en) | Method for extraction dephenolization of high-concentration chemical wastewater containing phenol ammonia coals | |
| CN101250079A (en) | Heat-exchange network device for refining crude benzene and method of operation | |
| CN102166428B (en) | Extractive distillation system for sulfur-containing toluene and refining method thereof | |
| CN107032555A (en) | A kind of method for handling oil-containing coal gasification waste water | |
| CN104447198A (en) | Novel separation technology for preparation of isopropanol by acetone hydrogenation | |
| CN202400996U (en) | Production device for extracting high-purity thiophene by coked crude benzene | |
| CN101671225A (en) | Method and equipment thereof for rectifying methylbenzene | |
| CN101468938B (en) | Composite solvent for extracting, distilling and separating styrene in hydrocarbons mixture, and method therefor | |
| CN100450982C (en) | Method for preparing purified petroleum benzine and concentrating thiofuran by cruden benzol | |
| CN101434556B (en) | Regeneration method of C5 fraction extracting solvent N,N-dimethylformamide | |
| CN101245044B (en) | Method for extracting biphenyl and indole from coal tar recovered wash oil | |
| CN102058993B (en) | Extractive rectification system for coked pure benzene or pure benzene containing sulfur and refining method thereof | |
| CN106380403B (en) | The method for efficiently separating dimethyl oxalate and dimethyl carbonate | |
| CN104447199A (en) | Method for preparing isopropanol by salt-adopted extraction rectification-based separation of acetone hydrogenation reaction products | |
| CN101270026A (en) | Abstraction distillation system special for carbonization benezene or sulfureous containing benezene, and fine purification method | |
| CN106146245A (en) | A kind of method using continuous azeotropic distillation technique to produce beta-methylnaphthalene | |
| CN201855589U (en) | Novel exhaust stabilization tower |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130227 Termination date: 20170712 |