Synthetic method for preparing colorless transparent alkyl polyglucoside

A technology for the synthesis of alkyl glycosides, which is applied to the preparation of sugar derivatives, chemical instruments and methods, sugar derivatives, etc., to achieve good effects, convenient operation, and good quality

Inactive Publication Date: 2010-04-21
石家庄金莫尔化学品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These above-mentioned catalysts have their own advantages and disadvantages, and there are still deficiencies in industrial production, and they still need to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In 3000 liters of reactors, add the glucose 480kg that contains a water of crystallization, C 8-10 Mixed fatty alcohol 1920kg, composite catalyst 3000g, described composite catalyst is to make by dodecylbenzenesulfonic acid and sodium hypophosphite in the ratio of 1: 0.2 by weight, start stirring and heating, under -0.095MPa vacuum , control the temperature in the kettle to 60° C., and maintain it for 1.5 hours. Then continuously increase the reaction temperature to 106°C, keep the reaction for 4.5 hours, pass the cooling water to reduce the temperature in the kettle to 70°C-80°C, add 750g of potassium hydroxide, neutralize to pH 8, stir for 30 minutes, and filter to obtain light yellow 2300kg of transparent alkyl glycoside alcohol solution.

[0025] The above-mentioned alkyl glucoside alcohol solution is distilled with excess higher fatty alcohol to obtain a light yellow transparent alkyl glycoside, and the above light yellow transparent alkyl glycoside is added to wa...

Embodiment 2

[0027] Add anhydrous glucose 600kg in 3000 liters reactor, C 8-10 Mixed fatty alcohol 1800kg, composite catalyst 3000g, described composite catalyst is made by dodecylbenzenesulfonic acid and sodium hypophosphite in the ratio of 1: 0.2 by weight, start stirring and heating, under the pressure of -0.098MPa , increase the reaction temperature to 90°C, keep it for 8 hours, then cool down to 75°C, add 700g of sodium hydroxide, neutralize the pH value to 7, stir for 20 minutes, and obtain 2340kg of light yellow alkyl glucoside alcohol solution, that is, light yellow Alkyl glucoside and fatty alcohol mixture, the above-mentioned light yellow alkyl glucoside and fatty alcohol mixture solution is dealcoholized in vacuum, that is, through distillation of excess fatty alcohol, to obtain light yellow transparent alkyl glycoside, the above light yellow transparent alkyl glycoside is in It is added into water at 70° C. under stirring, and dissolved into an aqueous solution with a concentra...

Embodiment 3

[0029] In 3000 liters of reactors, add the glucose 320kg that contains a water of crystallization, C 12-14 Mixed fatty alcohol 1680kg, composite catalyst 3000g, described composite catalyst is to be made by dodecylbenzenesulfonic acid and sodium hypophosphite in the ratio of 1: 0.2 by weight, start stirring and heating, under the pressure of -0.097MPa , control the temperature in the kettle to 60° C., and maintain it for 1.5 hours. Then continuously increase the reaction temperature to 115°C, keep it for 4 hours, then lower the temperature to 80°C, add 720g of sodium hydroxide, neutralize the total pH=6, stir for 20 minutes, and filter to obtain 1900kg of light yellow alkyl glycoside alcohol solution.

[0030] The above-mentioned alkyl glucoside alcohol solution is distilled with excess higher fatty alcohol to obtain a light yellow transparent alkyl glycoside, and the above light yellow transparent alkyl glycoside is added to water at 60°C under stirring, and dissolved to a co...

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PUM

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Abstract

The invention relates to a synthetic method for preparing colorless transparent alkyl polyglucoside, which comprises the following steps: adding glucosum anhydricum or glucose containing one crystal water and aliphatic alcohol with 8 to 20 carbon atoms into a reaction kettle in the weight ratio of 1:2.8-6.5; adding a composite catalyst containing dodecyl benzene sulfonic acid under the agitation of an emulsifying agitator; after undergoing a reaction for 4 to 8 hours at a temperature of between 80 and 120 DEG C under the vacuum condition of between -0.093 and -0.098 MPa, reducing the temperature to between 70 and 80 DEG C; adding neutralizer alkaline hydroxide, adjusting the pH value between 6 and 8 to obtain a flaxen mixture of alkyl polyglucoside and the aliphatic alcohol; and performing dealcoholization and blanching on the mixture to obtain a product of the colorless transparent alkyl polyglucoside. The method has a simple process and convenient operations. The process of the method not only can use the glucosum anhydricum, but also can use the glucose containing one crystal water, has a low cost and good quality; and the method adopts the composite catalyst, has a mild temperature, smooth water yielding and no phenomenon of foam overflow.

Description

technical field [0001] The invention belongs to a preparation method of alkyl glycosides, in particular to a new synthetic method for preparing colorless and transparent alkyl glycosides in one step. technical background [0002] Alkyl glucoside (also known as alkyl polyglycoside, APG for short) is a non-ionic surfactant, which is recognized as a green surfactant in the world because of its non-toxic, harmless and biodegradable properties. There are two industrial production methods, one is a two-step method (or glycoside conversion method), first reacting glucose with low-carbon alcohols, and then performing acetal exchange reaction with high-carbon alcohols to obtain high-carbon alcohol crude glycosides, which are distilled , dealcoholization, bleaching, etc., to obtain a 50% aqueous solution of alkyl glycosides. The two-step process is complicated, the product contains low-carbon glycosides, and has poor activity, so it has basically been eliminated. The second is a one...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H15/02C07H1/00C07H1/06B01J31/26
Inventor 李庆晨罗金根张兆林谈茂林
Owner 石家庄金莫尔化学品有限公司
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