CN1044568C - Distillation method for thermal sensitive material with simultaneous prodn. of light and heavy impurities - Google Patents
Distillation method for thermal sensitive material with simultaneous prodn. of light and heavy impurities Download PDFInfo
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- CN1044568C CN1044568C CN94101661A CN94101661A CN1044568C CN 1044568 C CN1044568 C CN 1044568C CN 94101661 A CN94101661 A CN 94101661A CN 94101661 A CN94101661 A CN 94101661A CN 1044568 C CN1044568 C CN 1044568C
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- tower
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- feed liquid
- sensitive material
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Abstract
The present invention relates to a distilling and separating method for heat sensitive materials. In the method, separated feed solution is added into a storing tank in batches and is then continuously added from the top of a stripping section, and meanwhile, total refluxing liquid of the tower is continuously led out from the lower end of a rectifying section of the tower and is used as a product or feed solution to be steamed for storing. The present invention can quickly remove generated light and heavy impurities from a tower top and a tower bottom when the heating degree of the materials is maximally reduced, and product purity is effectively improved. A device of the present invention has the advantages of simple structure, strong air tightness and reliable operation, and is practically used for the distillation of the polycomponent strong heat sensitive materials.
Description
The invention belongs to the distillation separation method of strong heat sensitive material.
So-called strong heat sensitive material is meant and produces material light, that weigh two class impurity simultaneously under vapo(u)rizing temperature.Adopt common distillation technique to separate this class material, product is inevitably always being carried light, the heavy seeds of a considerable amount of new generations secretly, and make product can not reach higher degree, for the strong heat sensitive material of this class, existing heat sensitive material distillation technology is (as Japan Patent, clear and 46-42762 and China's patent: ZL91111331.2 etc.) all do not prove effective, because they just conservatively reduce the heating degree of separation of material, and there is not thorough solution effectively to divest light, the heavy seeds problem of new generation.
The object of the present invention is to provide a kind of strong heat sensitive material separated new method that is useful for, this method is when reducing the material heating degree to greatest extent, can realize at the bottom of cat head, tower, promptly divesting the separation process produced simultaneously light again, heavy seeds, thus the purity of product can be improved greatly.
Technical essential of the present invention is, separated feed liquid adds in the feed liquid basin in batches, on the stripping section of destilling tower, add continuously then, and draw whole phegmas continuously from the rectifying section lower end of destilling tower to tower in the basin, and realized advancing the tower feed liquid with the heat exchange that goes out the tower feed liquid and on the communicating pipe of feed liquid basin and phegma basin, be provided with switch valve.
Accompanying drawing 1 is a process flow diagram of the present invention.Wherein 1 is the rectifying section and the complete condenser of destilling tower.2 is the stripping section and the heating kettle of destilling tower, and 3 is the phegma basin, and 4 is controlled valve, and 5 is the feed liquid basin, and 6 is Intermediate Heat Exchanger.
The separated process of the strong heat sensitive material of the invention process is: separated strong heat sensitive material is added in the feed liquid basin 5 in batches, through Intermediate Heat Exchanger 6 feed liquids enter continuously stripping section 2 upper ends as tower in dirty liquid, carry out convective mass transfer with rising steam, flow at the bottom of the tower after removing light component, its heavy ends are concentrated, feed liquid part discharging after concentrating, part vaporization in heating kettle produces in the steam reentrant stripping section, pass stripping section and enter rectifying section 1 and dirty liquid convection mass transfer, light component is concentrated, full rear section discharging with fixed attention, partial reflux, withdrawing fluid is all drawn outside the tower from the rectifying section lower end, after Intermediate Heat Exchanger and feeding liquid heat exchange to the phegma basin.If phegma concentration does not reach purity requirement as yet in jar, the feed liquid in feed liquid basin 5 is flow to end again, at this moment opens valve 4, allows in the reflux stream feeding liquid basin 5, distills once more, till meeting the requirements of concentration.
The present invention has the continuous still separating technology of lateral line discharging to have essential difference with existing, Mainly contain 3 differences: one, the present invention is batch charging, can repeat distillation, and single flash can obtain Get three or three above products; Two. the lower flow liquid of stripping section all derives from feeding liquid in the tower; The feed liquid of three, drawing from the rectifying section lower end is whole phegmas of cat head. And common continuous rectification side The line discharging is to draw partial material in the tower.
Use the present invention. From high-temperature heat-sensitive material tetraethylene glycol, divest simultaneously two, triethylene glycol and five Glycol impurity has obtained success, has obtained the tetraethylene glycol product of based on very high purity. Obviously, the present invention Also can be used for the separation of the strong heat sensitive material of multicomponent, acquisition is light at the bottom of cat head, tower, recombinating to divide reaches Inferior light, inferior when heavily waiting component, in tower, obtain volatility component product placed in the middle.
Distillation separation method of the present invention not only has and can reduce the material heating degree to greatest extent, divests simultaneously light, heavy ends fast, obtains the effect of high purity product, and has that device structure is simple, air-tightness strong, operate reliable advantage.
Claims (1)
1, by the stripping section and the heating kettle of destilling tower, the distilling apparatus that the rectifying section of destilling tower and complete condenser, feed liquid basin, phegma basin, Intermediate Heat Exchanger etc. constitute is implemented the distillation separation method of strong heat sensitive material, it is characterized in that:
A, separated feed liquid add in the feed liquid basin in batches and add in the tower on the stripping section of destilling tower continuously, draw whole phegmas continuously to tower exteenal reflux liquid basin from the rectifying section lower end of destilling tower simultaneously,
B, advance tower feed liquid and the phegma of drawing through the Intermediate Heat Exchanger heat exchange from the rectifying section lower end,
C, on the communicating pipe of feed liquid basin and phegma basin, be provided with controlled valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94101661A CN1044568C (en) | 1994-02-17 | 1994-02-17 | Distillation method for thermal sensitive material with simultaneous prodn. of light and heavy impurities |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94101661A CN1044568C (en) | 1994-02-17 | 1994-02-17 | Distillation method for thermal sensitive material with simultaneous prodn. of light and heavy impurities |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1093297A CN1093297A (en) | 1994-10-12 |
| CN1044568C true CN1044568C (en) | 1999-08-11 |
Family
ID=5030294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94101661A Expired - Fee Related CN1044568C (en) | 1994-02-17 | 1994-02-17 | Distillation method for thermal sensitive material with simultaneous prodn. of light and heavy impurities |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1044568C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219288B (en) * | 2007-09-28 | 2010-12-08 | 天津大学 | Tower body multi-point dispersed heating type stripper device and process method |
| CN101874934A (en) * | 2010-07-05 | 2010-11-03 | 天津大学 | Flash feed type internal heat integrated energy-saving rectification device and method |
| CN101874932A (en) * | 2010-07-05 | 2010-11-03 | 天津大学 | Heat-integrated energy-saving rectification device and method |
| CN101966398B (en) * | 2010-09-16 | 2012-05-02 | 天津大学 | Heat-integrated energy-saving rectification method and device for differential pressure column section of rectification column sequence |
| CN101966397B (en) * | 2010-09-16 | 2012-05-02 | 天津大学 | Energy-saving energy-saving rectification device and method in rectification column sequence |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87105188A (en) * | 1986-07-23 | 1988-02-03 | 布斯公司 | Handle the method for short residuum oil in the crude oil refinement |
| CN1040358A (en) * | 1988-08-01 | 1990-03-14 | 纳幕尔杜邦公司 | By being separated and the hydrofluoric method of fractionation by distillation |
-
1994
- 1994-02-17 CN CN94101661A patent/CN1044568C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87105188A (en) * | 1986-07-23 | 1988-02-03 | 布斯公司 | Handle the method for short residuum oil in the crude oil refinement |
| CN1040358A (en) * | 1988-08-01 | 1990-03-14 | 纳幕尔杜邦公司 | By being separated and the hydrofluoric method of fractionation by distillation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1093297A (en) | 1994-10-12 |
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