Process for the continuous production of alkyl glycosides

An alkyl glycoside, continuous technology, applied in the field of continuous production of alkyl glycosides, can solve the problems of easy accumulation at the bottom of the equipment, darkening of product color, slow reaction speed, etc., to eliminate the influence of color and impurities, efficiently remove, avoid deposition effect

Active Publication Date: 2018-11-23
河北合佳医药科技集团股份有限公司
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  • Description
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  • Application Information

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Problems solved by technology

However, in the one-step production of alkyl glycosides, anhydrous glucose and fatty alcohols react in solid-liquid phase, and the reaction speed is slow. Anhydrous glucose is easy to accumulate at the bottom of the equipment, resulting in low utilization of sugar, complicated subsequent treatment, and subsequent dealcoholization. When the residual sugar in the material is coked at high temperature, it is easy to cause the color of the product to deepen
The currently reported one-step method for synthesizing alkyl glycosides, the color of synthetic crude alkyl glycosides is mostly brown, red, yellow, and the product can only reach light yellow after bleaching, and only anhydrous glucose can be used as raw material, and the production cost is relatively low. high

Method used

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  • Process for the continuous production of alkyl glycosides
  • Process for the continuous production of alkyl glycosides

Examples

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Embodiment 1

[0027] This example relates to a set of methods for the continuous production of alkyl glycosides. figure 1 In the production unit shown.

[0028] Such as figure 1 As shown, the production device for continuous production of alkyl glycosides includes a DSC control system 1, which is used to regulate and control the reaction material mixer 2, continuous reactor 3, condenser 4, neutralization reactor 5, and And the operation of the continuous dealcoholization device 6, the product blender 7, and the continuous decolorization device 8. The continuous reactor 3 is horizontal and rake stirring, and is divided into three reaction zones; the continuous dealcoholization device 6 includes The first-stage scraped film evaporator 9, the second-stage short-path evaporator 10, and the third-stage short-path evaporator 11 are arranged in sequence, and the continuous decolorization device includes a first-stage decolorization tower 12, a second-stage decolorization tower 13, and a third-stage ...

Embodiment 11

[0031] Add anhydrous glucose, C12-14 fatty alcohol and dodecylbenzene sulfonic acid at a molar ratio of 1:3.5:0.03 to the reaction material mixer. Under the control of the DSC control system, the uniformly mixed reaction materials are continuously added to the In a continuous reactor, stay for 3 hours at a vacuum of 10-15 mmHg and a temperature of 110°C, then enter the condenser to cool to 60°C, and then enter the neutralization reactor, and adjust by continuously adding a mixture of MgO and sodium hydroxide The pH is 9 to obtain a milky white reaction mixture containing alkyl glycosides and fatty alcohols. The reaction mixture enters the continuous dealcoholization device. Under a vacuum of 4mmHg and a temperature of 130°C, unreacted C12-14 fatty alcohols are removed to obtain product alkanes. Alkyl glycosides are prepared by adding water to form an alkyl glycoside solution with a content of 50%, and finally a colorless, transparent, tasteless, and stable quality alkyl glycosid...

Embodiment 12

[0034] Add glucose monohydrate, C16-18 fatty alcohol and p-toluenesulfonic acid at a molar ratio of 1:4:0.04 to the reaction material mixer. Under the control of the DSC control system, the uniformly mixed reaction materials are continuously added to the continuous reactor In the medium, under the vacuum degree of 15-20mmHg and the temperature of 150 ℃, stay for 2.5 hours, then enter the condenser to cool to 70 ℃, and then enter the neutralization reactor, by continuously adding the mixture of NaO and sodium hydroxide, adjust the pH to 9.5. Obtain a milky white reaction mixture containing alkyl glycosides and fatty alcohols. The reaction mixture enters a continuous dealcoholization device. Under a vacuum of 3mmHg and a temperature of 150°C, unreacted C16-18 fatty alcohols are removed to obtain the product alkyl glycosides , Water is added to prepare an alkyl glycoside solution with a content of 50%, and finally a colorless, transparent, tasteless, and stable quality alkyl glycos...

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Abstract

The invention relates to a method for continuously producing alkyl glucoside. According to the method, anhydrous glucose or glucose monohydrate and fatty alcohol carry out reactions continuously; then the reaction product is subjected to a continuous three grade vacuum distillation alcohol removing treatment, which comprises primary scraping plate evaporation, secondary short term evaporation, and tertiary short term evaporation, to remove fatty alcohol, and finally the reaction product is subjected to a continuous three-grade counter current discoloring treatment, which adopts ozone as the discoloring agent, so as to produce colorless, transparent, high purity and high quality alkyl glucoside. The obtained alkyl glucoside is colorless, transparent, and tasteless, and has the advantages of stable quality, high surface activity, good ecological safety, good intermiscibility, and low production cost. At the same time, the invention also relates to a production device capable of producing alkyl glucoside continuously, and has the advantages of high automation degree, short procedure, and suitability for large scale industrial production.

Description

Technical field [0001] The invention relates to a method for producing alkyl glycosides, in particular to a method for continuously producing alkyl glycosides. At the same time, the invention also relates to a production device used in the method for continuously producing alkyl glycosides. Background technique [0002] Alkyl glycosides (also known as alkyl polyglycosides, abbreviated as APG) are formed from natural renewable resources fatty alcohols and glucose, which are dehydrated under acidic catalysts, with alkyl groups as lipophilic groups and sugar units as hydrophilic groups. Because it has almost no irritation and can be completely biodegradable, it is a new type of nonionic surfactant with more comprehensive performance. It has the characteristics of ordinary nonionic and anionic surfactants, has high surface activity, good ecological safety and Compatibility, it is internationally recognized as the first choice "green" functional surfactant. Its industrial production ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H15/04C07H1/00C07H1/06
CPCC07H1/00C07H1/06C07H15/04
Inventor 刘振强董永利王荣霞
Owner 河北合佳医药科技集团股份有限公司
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