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Method for preparing alkyl glucoside

A technology of alkyl glycosides and glucose, which is applied in the field of preparation of alkyl glycosides, can solve the problems affecting the quality and application range of surfactant alkyl glycosides, deepening the color of alkyl glycosides, and low conversion rate of glucose, etc. Conversion rate, ease of operation and control, and the effect of improving catalytic efficiency

Inactive Publication Date: 2005-06-08
兰州鸿卉生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyzer that this method adopts has low conversion rate of glucose when preparing alkyl glucoside, is easy to polymerize, and very easily produces undesirable colored matter, causes the color of alkyl glucoside to deepen, thereby has influenced the quality and quality of surfactant alkyl glycoside Application range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1: Add 200 grams of anhydrous glucose, 642 grams of mixed alcohol, 4.2 grams of p-toluenesulfonic acid, and 5 ml of phytic acid to a 2-liter three-necked flask with stirring and equipped with a water separator, stir and heat to 90~ Heat at 120°C for 3 hours until the reaction solution is clear and the reaction is complete. The water produced in the reaction can be collected by cooling with liquid nitrogen to determine whether the reaction has reached the end point. The APHA of the reaction liquid refers to the floating solid content in the reaction liquid. The reaction liquid APHA2 O 2 4ml bleached to alkyl glycoside, APHA<30.

Embodiment 2

[0011] Example 2: Add 30 grams of Amylaceae starch, 360 grams of mixed alcohol, 2.6 grams of p-toluenesulfonic acid, and 8 ml of phytic acid to the above equipment, stir and heat to 90-110°C for 4 hours until the reaction solution is clear and the reaction is complete. The water produced in the reaction can be collected by cooling with liquid nitrogen to determine whether the reaction has reached the end point. The reaction liquid APHA<150. In this equipment, continue to remove part of the alcohol at 130-150°C, and then pour the reaction liquid into the molecular distillation equipment, and distill the solid alkyl glycoside according to the method of Example 1, with APHA<250.

Embodiment 3

[0012] Example 3: Add 100 grams of corn starch, 648 grams of mixed alcohol, 6 grams of p-toluenesulfonic acid, and 10 ml of phytic acid to the above equipment, stir and heat to 100-140°C for 6 hours until the reaction solution is clear and the reaction is complete. The water produced in the reaction can be collected by cooling with liquid nitrogen to determine whether the reaction has reached the end point. The reaction liquid APHA<150. Then, the reaction liquid was poured into molecular distillation equipment, and the solid alkyl glycoside was obtained by distillation according to the method in Example 1.

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Abstract

A process for preparing alkylglucoside includes such steps as proportionally mixing the mixture of ethanediol and dodecyl alcohol with glucose, adding acidic catalyst prepared from aromatic sulfonic acid and aliphatic sulfonic acid, acetalizing reaction at 80-170 deg.C, and removing alcohol.

Description

Technical field [0001] The invention relates to a preparation method of alkyl glycosides. Background technique [0002] US Patent No. 3,839,318 discloses the preparation of alkyl glycosides by heating and depressurizing processes in the presence of acid catalysts such as sulfuric acid, hydrochloric acid, and sulfonic acid resin using glucose and alcohol. The catalyst used in this method has a low glucose conversion rate and is easy to polymerize during the preparation of alkyl glycosides, and is extremely easy to produce undesirable colored substances, resulting in darkening of the color of alkyl glycosides, thereby affecting the quality and quality of the surfactant alkyl glycosides. Application range. Summary of the invention [0003] The purpose of the present invention is to use glucose and starch as raw materials to prepare alkyl glycosides. [0004] The present invention is a method for preparing alkyl glycosides. Mixed alcohol composed of ethylene glycol and lauryl alcoho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H15/04
Inventor 王青宁李春雷俞树荣冯辉霞叶启智
Owner 兰州鸿卉生物科技有限公司
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