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Method for continuous countercurrent extraction of long-chain fatty alcohol in alkyl glycoside crude product

A technology for alkyl glycosides and fatty alcohols, which is applied in the field of continuous countercurrent extraction of long-chain fatty alcohols in crude alkyl glycosides, can solve the problems of increased processing steps and production costs, complicated separation process steps, difficult industrial application and the like, and achieves extraction regulation. No pollution, strong extraction ability, mild extraction adjustment

Active Publication Date: 2020-04-21
南通睿智超临界科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can obtain solid alkyl glycosides, the separation process steps are complicated, the cost is high, and it is difficult to apply industrially
The invention patent with the application number 201710752316X discloses a method for obtaining powdered alkyl glycosides, using methyl formate, methyl acetate, ethyl acetate, methyl propionate, ethyl propionate, acetone, butanone, cyclopentyl Ketone, a mixture of two or more of cyclohexanone, methanol, ethanol, propanol, butanol, ethylene glycol, polyethylene glycol, acetonitrile, propionitrile, and butyronitrile as the extractant, at 30°C to 60°C , extract 3-6 times to obtain powdered alkyl glycosides, although this method can obtain powdered products, but because a large amount of organic solvents are used, and there is also the problem of separation and purification of organic solvents and fatty alcohols, thereby increasing the processing steps and production cost

Method used

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  • Method for continuous countercurrent extraction of long-chain fatty alcohol in alkyl glycoside crude product
  • Method for continuous countercurrent extraction of long-chain fatty alcohol in alkyl glycoside crude product
  • Method for continuous countercurrent extraction of long-chain fatty alcohol in alkyl glycoside crude product

Examples

Experimental program
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Effect test

Embodiment 1

[0043] see Figure 1-2 , put 2000 grams of crude alkyl glycosides into the material tank 6, the crude alkyl glycosides are pumped into the extraction tower 4 through the material pump 5, and at the same time, CO2 comes out of the CO2 cylinder 1 and is pumped into the condenser 2 with the CO2 high-pressure pump 3 In the extraction tower, the temperature and pressure of the extraction tower are 55°C and 15MPa respectively, and the weight ratio of the crude alkyl glycoside material to CO2 is 1:10. During the continuous countercurrent extraction process, the fatty alcohol comes out of the extraction tower along with CO2 into the Separator 7, after the fatty alcohol is separated in the separator, CO2 is recycled through the condenser, and the liquid product of alkyl glycosides that removes the fatty alcohol is collected from the bottom of the extraction tower. During the continuous feeding process, the fatty alcohol and alkyl glycoside products are collected from the separator and ...

Embodiment 2

[0049] see Figure 1-2 , put 2000 grams of crude alkyl glycosides into the material tank 6, the crude alkyl glycosides are pumped into the extraction tower 4 through the material pump 5, and at the same time, CO2 comes out of the CO2 cylinder 1 and is pumped into the condenser 2 with the CO2 high-pressure pump 3 In the extraction tower, the temperature and pressure of the extraction tower are 60°C and 25MPa respectively, and the weight ratio of the crude alkyl glycoside material to CO2 is 1:8. During the continuous countercurrent extraction process, the fatty alcohol comes out of the extraction tower along with CO2 into the Separator 7, after the fatty alcohol is separated in the separator, CO2 is recycled through the condenser, and the liquid product of alkyl glycosides that removes the fatty alcohol is collected from the bottom of the extraction tower. During the continuous feeding process, the fatty alcohol and alkyl glycoside products are collected from the separator and t...

Embodiment 3

[0052] see Figure 1-2 , put 2000 grams of crude alkyl glycosides into the material tank 6, the crude alkyl glycosides are pumped into the extraction tower 4 through the material pump 5, and at the same time, CO2 comes out of the CO2 cylinder 1 and is pumped into the condenser 2 with the CO2 high-pressure pump 3 In the extraction tower, the temperature and pressure of the extraction tower are 65°C and 30MPa respectively, and the weight ratio of the crude alkyl glycoside material to CO2 is 1:7. During the continuous countercurrent extraction process, the fatty alcohol comes out of the extraction tower along with CO2 into the Separator 7, after the fatty alcohol is separated in the separator, CO2 is recycled through the condenser, and the liquid product of alkyl glycosides that removes the fatty alcohol is collected from the bottom of the extraction tower. During the continuous feeding process, the fatty alcohol and alkyl glycoside products are collected from the separator and t...

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Abstract

The invention discloses a method for continuous countercurrent extraction of long-chain fatty alcohol in an alkyl glycoside crude product, and belongs to the technical field of light chemical daily necessity separation. According to the invention, with the method, a supercritical CO2 extraction technology can be realized, continuous countercurrent extraction on long-chain fatty alcohol in an alkylglycoside crude product can be achieved, the purpose of high-precision purification is achieved, extraction is mild in regulation and free of pollution, the extraction capability and the extraction rate are high, and the extraction time is short, so that the method is an environmentally-friendly separation and purification technology; CO2 can be continuously separated without speed reduction under the cooperation of a co-current adsorption assembly, and long-chain fatty alcohol entrained in CO2 gas can be actively adsorbed under the condition of maintaining temperature and air pressure, so that the CO2 separation effect is further improved, and the high extraction effect is kept when CO2 is recycled; and the co-current adsorption assembly can also desorb and recover long-chain fatty alcohol after extraction is finished so as to substantially improve the extraction rate of the long-chain fatty alcohol compared with the prior art, and the co-current adsorption assembly can be repeatedlyused after desorption treatment.

Description

technical field [0001] The invention relates to the technical field of separation of light chemical daily necessities, and more specifically relates to a method for continuous countercurrent extraction of long-chain fatty alcohols in crude alkyl glycosides. Background technique [0002] Alkyl Polyglycoside (APG for short) is a new type of green mild non-ionic surfactant synthesized from sugars and fatty alcohols. It is internationally recognized as the first choice for green functional surfactants. Active agent with high ecological safety and high surface activity. APG has a series of excellent high surface activity, safety and compatibility such as thickening, solubilizing and emulsifying. Therefore, it is widely used in detergents, personal care agents, cosmetics, disinfectant lotions, industrial auxiliaries, and pesticide emulsions, etc. It is widely used in daily chemical, agricultural medicine, plastic building materials, petrochemical and many other fields. [0003] ...

Claims

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Application Information

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IPC IPC(8): C07H15/04C07H1/06C07C29/74C07C29/76C07C31/125B01D11/00B01D11/02
CPCC07H15/04C07H1/06C07C29/74C07C29/76B01D11/00B01D11/0203B01D2011/002B01D2011/005C07C31/125Y02P20/54
Inventor 赵亚平孙明华高小红黄书成孙如兵
Owner 南通睿智超临界科技发展有限公司
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