CN1064224A - Adsorption-distillation separation method - Google Patents
Adsorption-distillation separation method Download PDFInfo
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- CN1064224A CN1064224A CN 92102546 CN92102546A CN1064224A CN 1064224 A CN1064224 A CN 1064224A CN 92102546 CN92102546 CN 92102546 CN 92102546 A CN92102546 A CN 92102546A CN 1064224 A CN1064224 A CN 1064224A
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- distillation
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Abstract
The present invention relates to a kind of separation method of liquid mixture.This method integrates the advantage of absorption and distillation separation method, and absorption and still-process are carried out in same tower simultaneously, realizes continuous gas-liquid-solid three-phase mass transfer.The present invention is specially adapted to separating of the azeotropic mixture liquid mixture close with boiling point, can obtain the high purity product of a component in the difficult separation mixture, can be widely used in the separation engineering of industries such as chemical industry, medicine, food.
Description
The invention belongs to the continuous separation method of liquid mixture.
Absorption and distillation are two independently separation unit operation.Advantages such as to have disposal ability big in distillation, and the simple and process of equipment is continuous are widely used in production fields such as chemical industry.But its energy consumption is bigger, and not being suitable for separating has azeotropic mixture or the approaching system of boiling point, and product purity is not high enough; Absorption has the separation factor height, energy consumption is low and the high advantage of product purity.But because of the cause that adsorbent need be regenerated, operation is difficult to serialization.At present, the alternate application distillation has the report that difficult separation mixture separates with adsorption separating method: Liquid mixture separation by combined adsorption and rectification, Ger.DE3712291(CIB01D3/32), 27, Oct.1988, Appl.10, Apr.1987. but this is absolutely not continuous adsorption and the distillation procedure that carries out simultaneously in same equipment.
The purpose of this invention is to provide a kind of adsorption-distillation separation method, this method can integrate the advantage of distillation and adsorption separating method, is specially adapted to the separation of the close liquid mixture of azeotropic mixture or boiling point.
Key problem in technology of the present invention is a gas-liquid-solid three-phase mass transfer of realizing continuous, multistage and adverse current in same tower, makes distillation and adsorb two separation processes to carry out simultaneously.
Accompanying drawing is the schematic flow sheet that the present invention adopts when being used to separate three components or binary liquid mixture.Wherein 1 is reboiler, and 2 is the adsorptive distillation tower, and 3 is condenser, and 4 are continuous still desorption device (applied for Chinese invention patent, applied for a patent name and be called " distillation desorption process for regenerating of adsorbent ").
This flow process realizes that to three component fluids mixtures the adsorptive distillation separation process is: establish liquid mixture to be separated and be made up of A, B and C component, its boiling point is T in proper order
A＜T
B＜T
C, and A component and the B component can form azeotropic mixture or boiling point is approaching.This mixture is imported in the tower continuously by adsorptive distillation tower middle part certain position, imports a certain amount of adsorbent that can select to adsorb the B component continuously at tower top certain position simultaneously.In the adsorptive distillation tower, because the effect of distillation, A component and B component be to the cat head enrichment, C component and the enrichment at the bottom of tower of most of B component.Adsorbent flows downward in the process mutually with liquid in tower, selects absorption B component.By condenser, can obtain high-purity A component product at cat head continuously, at the bottom of tower, adsorb B component and the adsorbent that reaches capacity and B and C component, be admitted in the desorption device 4.In the desorption device, utilize the C component adsorbent that has adsorbed the B component to be carried out distillation desorption as desorbing agent, obtain B component product by desorption device top, obtain C component product in desorption device bottom.For the ease of carrying the solid absorbent of having regenerated, utilize portion C component product as adsorbing agent carrier, form slurry with adsorbent, import again in the adsorptive distillation tower, reach the purpose that recycles adsorbent.
Adopt flow process of the present invention to realize that the adsorptive distillation separation process of binary liquid mixture is: establish liquid mixture to be separated and form, need at this moment to select that a kind of pure component liquid C is double does desorbing agent and carrier, and boiling point to be in proper order: T by A component and B component
A＜T
B＜T
C, its method of operating is identical with separating three component fluids mixtures, and the result can obtain pure component A product at the adsorptive distillation cat head, can obtain B component product on desorption device top, and C component double as desorbing agent and liquid-carrier recycle with adsorbent.
Adsorptive distillation method of the present invention, the advantage such as the product purity height is arranged, energy consumption is low, operation is continuous, equipment is simple and treating capacity is big is particularly suitable for separating at production fields such as chemical industry azeotropic mixture or the close liquid mixture of boiling point is arranged.
The present invention is for separating of ethanol-water mixture, and alcohol product purity reaches 99.9%.
Claims (4)
1, constitutes piece-rate system by reboiler, adsorptive distillation tower, condenser and continuous still desorption device, in the adsorptive distillation tower of this system, realize simultaneously absorption with distillation procedure, be applicable to separate that azeotropic mixture or the close liquid mixture adsorption distillating method of boiling point are arranged, it is characterized in that:
A. the liquid mixture that will separate enters in the tower at the middle part of adsorptive distillation tower continuously;
B. in the time of with charging, solid absorbent is mixed into oar with double as desorbing agent liquid-carrier and enters in the tower continuously on adsorptive distillation tower top behind the distillation desorption in-situ regeneration;
The net product of c. a certain difficult low boiling component of separating is from the adsorptive distillation cat head, through the continuous extraction of condenser;
D. the high boiling component that is enriched at the bottom of the adsorptive distillation Tata is together sent into the distillation desorption device continuously with the saturated adsorbent that has adsorbed a certain component.
2, by the said adsorptive distillation method of claim 1, it is characterized in that: the liquid-carrier of selected double as desorbing agent, can be high boiling component in institute's separating liquid mixture, or another boiling point be higher than the neat liquid of all components boiling point in institute's separating liquid.
3, by the said adsorptive distillation method of claim 2, it is characterized in that: the liquid-carrier of double as desorbing agent recycles in piece-rate system.
4, by the said adsorptive distillation method of claim 1, it is characterized in that: adsorbent recycles in piece-rate system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92102546 CN1022291C (en) | 1992-04-17 | 1992-04-17 | Adsorption-distillation separation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92102546 CN1022291C (en) | 1992-04-17 | 1992-04-17 | Adsorption-distillation separation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1064224A true CN1064224A (en) | 1992-09-09 |
| CN1022291C CN1022291C (en) | 1993-10-06 |
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ID=4939716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92102546 Expired - Fee Related CN1022291C (en) | 1992-04-17 | 1992-04-17 | Adsorption-distillation separation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1022291C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1298811C (en) * | 2004-12-10 | 2007-02-07 | 天津大学 | Dewatering method of fusel oil in production of aclohol fuel |
| CN101227959B (en) * | 2005-07-26 | 2011-01-26 | 葡萄牙帕特克斯石油工业服务公司 | Process and device for separation of liquids emulsified in mixtures of liquids and gases dissolved in mixtures of liquids and gases by localized pressure reduction |
| CN101180112B (en) * | 2005-03-22 | 2011-02-02 | 拜尔技术服务有限责任公司 | Method for the distillative purification of slow-evaporating fluids |
| CN102559204A (en) * | 2010-12-13 | 2012-07-11 | 财团法人工业技术研究院 | Method and apparatus for purifying alignment solution |
| WO2022042508A1 (en) * | 2020-08-26 | 2022-03-03 | 中国石油化工股份有限公司 | Composite adsorbent for separating ethylbenzene by adsorptive rectification and use thereof |
-
1992
- 1992-04-17 CN CN 92102546 patent/CN1022291C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1298811C (en) * | 2004-12-10 | 2007-02-07 | 天津大学 | Dewatering method of fusel oil in production of aclohol fuel |
| CN101180112B (en) * | 2005-03-22 | 2011-02-02 | 拜尔技术服务有限责任公司 | Method for the distillative purification of slow-evaporating fluids |
| CN101227959B (en) * | 2005-07-26 | 2011-01-26 | 葡萄牙帕特克斯石油工业服务公司 | Process and device for separation of liquids emulsified in mixtures of liquids and gases dissolved in mixtures of liquids and gases by localized pressure reduction |
| CN102559204A (en) * | 2010-12-13 | 2012-07-11 | 财团法人工业技术研究院 | Method and apparatus for purifying alignment solution |
| CN102559204B (en) * | 2010-12-13 | 2014-03-12 | 财团法人工业技术研究院 | Method and apparatus for purifying alignment solution |
| WO2022042508A1 (en) * | 2020-08-26 | 2022-03-03 | 中国石油化工股份有限公司 | Composite adsorbent for separating ethylbenzene by adsorptive rectification and use thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1022291C (en) | 1993-10-06 |
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