Method for preparing alkyl glucoside

A technology of alkyl glucoside and glucose, which is applied in the preparation of sugar derivatives, chemical instruments and methods, sugar derivatives, etc., can solve the problems of low reaction yield, complicated operation, and high difficulty in post-processing, and achieve good color and luster, single The effect of less sugar residue

Active Publication Date: 2011-07-20
SHANGHAI CHLOR ALKALI CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the preparation method for preparing alkyl glucoside, such as the preparation method disclosed in Chinese patent, application number 201010101523, is characterized in that monosaccharide and long-chain alkyl alcohol are used as raw materials in H 2 S0 4 / SiO 2 Synthetic reaction under the catalysis of solid acid, and then prepared by dehydration condensation, the operation is complicated, the reaction yield is low, the post-treatment is difficult, and it cannot meet the needs
[0005] P-toluenesulfonic acid and dodecylbenzenesulfonic acid are the main catalysts in the production process of alkyl glycosides. It has been reported that using p-toluenesulfonic acid alone as a catalyst has a low final yield and is difficult for industrial production

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  • Method for preparing alkyl glucoside

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Embodiment 1

[0030] (1) Glucose and C 8 Alcohol (octanol) was reacted at 100° C. for 5 hours under vacuum conditions in the presence of a composite catalyst;

[0031] The vacuum degree is 2000Pa (equivalent to 15.00mmHg);

[0032] The composite catalyst is composed of main catalyst, co-catalyst and co-catalyst;

[0033] The main catalyst is dodecylbenzenesulfonic acid;

[0034] The promoter is sulfurous acid;

[0035] Cocatalyst is sulfamic acid;

[0036] The weight ratio of main catalyst, procatalyst and cocatalyst is:

[0037] Main catalyst: co-catalyst: co-catalyst=1: 0.16: 0.02;

[0038] The weight consumption of composite catalyst is 2% of glucose weight;

[0039] Glucose and C 8 The molar ratio of alcohol (octanol) is 1: 3;

[0040] (2) Then lower the temperature to 80°C, add NaOH to neutralize the system pH to 8, and obtain light yellow alkyl glucoside and C 8 Alcohol (octanol) mixture;

[0041] (3) dealcoholization under 200Pa vacuum, dealcoholization temperature is 120 ℃...

Embodiment 2

[0044] (1) Glucose and C 10 Alcohol (decyl alcohol) was reacted at 120° C. for 2 hours under vacuum conditions in the presence of a composite catalyst;

[0045] The vacuum degree is 1500Pa (equivalent to 11.25mmHg);

[0046] The composite catalyst is composed of main catalyst, co-catalyst and co-catalyst;

[0047] The main catalyst is p-toluenesulfonic acid;

[0048] Promoter is phosphoric acid;

[0049] Cocatalyst is sulfamic acid;

[0050] The weight ratio of main catalyst, procatalyst and cocatalyst is:

[0051] Main catalyst: co-catalyst: co-catalyst=1: 0.12: 0.04;

[0052] The weight consumption of composite catalyst is 0.5% of glucose weight;

[0053] Glucose and C 10 The molar ratio of alcohol (decanol) is 1: 3;

[0054] (2) Then lower the temperature to 70°C, add sodium methoxide to neutralize the system pH to 6, and obtain nearly colorless alkyl glucoside and C 10 Alcohol (decanol) mixture;

[0055] (3) dealcoholization under 100Pa vacuum, dealcoholization t...

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Abstract

The invention provides a method for preparing alkyl glucoside. The method for preparing the alkyl glucoside comprises the following steps of: (1) performing vacuum reaction on glucose and C8-C12 fatty alcohol in the presence of a composite catalyst for 2 to 8 hours, wherein the composite catalyst consists of a main catalyst, a cocatalyst and an auxiliary catalyst, the main catalyst is para-toluenesulfonic acid or dodecylbenzene sulfonic acid, the cocatalyst is phosphoric acid or sulfurous acid, and the auxiliary catalyst is sulfamic acid; (2) cooling and adding an alkaline substance until the pH value of a system is neutralized to be 6 to 8 to obtain a mixture of the alkyl glucoside and the fatty alcohol; and (3) removing the fatty alcohol under high vacuum, adding water until the solid content of the system is 45 to 50 weight percent, and adding the alkaline substance to adjust the pH value of the system to be 12 to 14 to obtain the product. By the method, the final yield of the product is more than 155 percent and a small number of monosaccharide residues and other byproducts are obtained. The color and the luster of the product are not changed obviously in the dealcholization process; and the final product is colorless transparent liquid.

Description

technical field [0001] The present invention relates to a preparation method for preparing alkyl glucoside. Background technique [0002] Alkyl glucoside, referred to as APG, is synthesized from renewable resources, natural fatty alcohol and glucose. It is a new type of nonionic surfactant with comprehensive performance. Active, good ecological safety and compatibility, it is the first-choice "green" functional surfactant recognized internationally. [0003] Alkyl glucoside has low surface tension, no cloud point, adjustable HLB value, strong wetting power, strong detergency, rich and delicate foam, strong compatibility, non-toxic, harmless, non-irritating to the skin, and rapid and thorough biodegradation. It can be compounded with any type of surfactant, and the synergistic effect is obvious. Alkyl glucosides have strong broad-spectrum antibacterial activity, remarkable thickening effect, easy dilution, no gel phenomenon, easy to use, and also have excellent characterist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H15/04C07H1/00
Inventor 徐佘文骊邓兴良
Owner SHANGHAI CHLOR ALKALI CHEM
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