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Preparation method of alkyl polyglycoside by using sulphonating graphene as catalyst

A technology of sulfonated graphene and alkyl glycosides, which is applied in the direction of physical/chemical process catalysts, preparation of sugar derivatives, chemical instruments and methods, etc., can solve the problems of incomplete conversion and high production costs, and achieve stable product properties and catalytic The effect of short time and high catalytic yield

Inactive Publication Date: 2020-01-14
上海吉奉生物科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It mainly solves the technical problems of incomplete conversion and high production cost existing in existing synthetic methods

Method used

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  • Preparation method of alkyl polyglycoside by using sulphonating graphene as catalyst
  • Preparation method of alkyl polyglycoside by using sulphonating graphene as catalyst
  • Preparation method of alkyl polyglycoside by using sulphonating graphene as catalyst

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Experimental program
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Effect test

Embodiment 1

[0020] (1) Preparation of p-aminobenzenesulfonic acid diazonium salt: p-aminobenzenesulfonic acid and sodium nitrite were dissolved in hydrochloric acid solution, and the p-aminobenzenesulfonic acid diazonium salt was prepared under the condition of ice bath cooling.

[0021] (2) Sulfonation of graphene oxide: Dissolve 1.35 g of diazonium salt of p-aminobenzenesulfonic acid in 10 mL of twice distilled water, and slowly add the solution dropwise to 13 mL of 1 mg / mL graphene oxide (see figure 2 ) suspension, ice-bathed, and vigorously stirred for 6 hours; filtered and washed with water until neutral, and vacuum-dried to obtain a sulfonated graphene catalyst. Infrared spectrum see figure 1 .

[0022] (3) Add 3g of anhydrous glucose into a three-necked flask with a stirrer (see image 3 ), 18g of ethanol, preheated at 80°C and refluxed for 20min, added 0.3g of sulfonated graphene, and continued to reflux at 155°C for 30min with heating and stirring.

[0023] (4) Heat filtratio...

Embodiment 2

[0025] Add 3 g of anhydrous glucose and 15 g of lauryl alcohol into a three-necked flask with a stirrer, preheat to reflux at 80°C for 20 minutes, add 0.3 g of sulfonated graphene, and continue heating and stirring at reflux at 140°C for 30 minutes. After the reaction, the sulfonated graphene was removed by filtration, and the filtrate was distilled under reduced pressure to obtain a light yellow syrupy product with a product yield of 97%. All the other are with embodiment 1.

Embodiment 3

[0027] Add 3 g of anhydrous glucose and 12 g of lauryl alcohol into a three-necked flask with a stirrer, preheat to reflux at 80°C for 20 minutes, add 0.3 g of sulfonated graphene, and continue heating and stirring at reflux at 170°C for 30 minutes. After the reaction, the sulfonated graphene was removed by filtration, and the filtrate was distilled under reduced pressure to obtain a light yellow syrupy product with a product yield of 97%. All the other are with embodiment 1.

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Abstract

The invention discloses a preparation method of alkyl polyglycoside by using sulphonating graphene as a catalyst, and mainly aims to solve the technical problems of incomplete transformation and highproduction cost existing in a conventional synthesis method. The preparation method comprises the following steps of performing diazotization modification on sulfanilic acid, enabling the sulfanilic acid after the diazotization modification to react with active hydroxyls and epoxy groups on the surface of oxidized graphene to obtain an oxidized graphene loaded benzene sulfonic acid catalyst, enabling glucose and fatty alcohol to be mixed and dissolve, and by using the sulphonating graphene as the catalyst, performing one-step glycosidation so as to obtain the alkyl polyglycoside.

Description

technical field [0001] The invention relates to a method for preparing an alkyl glycoside using a sulfonated graphene catalyst, and belongs to the technical field of alkyl glycoside preparation. Background technique [0002] Alkyl glucoside (APG) is a kind of surfactant formed by the condensation of glucose and fatty alcohol under acidic conditions by losing a molecule of water. It has the characteristics of both nonionic and anionic surfactants. Unlike general non-ionic surfactants, alkyl glycosides have no cloud point, high surface activity, good detergency and compatibility, easy biodegradation, and environmental friendliness. They are widely used in detergents, emulsifiers, cosmetics, food and pharmaceuticals industry etc. [0003] At present, the synthesis methods of alkyl glycosides mainly include Koenings-Khorr reaction preparation method, enzyme-catalyzed synthesis method, acetylation alcoholysis method, sugar ketal alcoholysis method and Fisher synthesis method, et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H15/04C07H1/00B01J31/06B01J35/10
CPCC07H15/04C07H1/00B01J31/069B01J35/61
Inventor 徐红岩郭威
Owner 上海吉奉生物科技有限公司
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