A kind of compound organic acid catalyzed method for preparing dodecyl glucoside

A technology of dodecyl glucoside and organic acid catalyst, applied in organic chemistry, chemical instruments and methods, organic compound/hydride/coordination complex catalyst, etc., can solve the problem of low saturation solubility of glucose and inability to form a homogeneous system , Unstable product quality and other issues, to achieve the effect of low residual alcohol content, light product color, and not easy to return to acid

Active Publication Date: 2017-01-04
ZHEJIANG HUANGMA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are two main methods for synthesizing the glycoside, one-step method and two-step method. In the two-step method, glucose is first reacted with low-carbon alcohol, and then high-carbon alcohol is used for transglycosidation reaction. This process has long reaction time and technical process. Complicated, high production costs and other issues have been gradually eliminated
The one-step synthesis of glycosides mainly faces the following problems: first, the saturated solubility of glucose in dodecyl alcohol is very small, and it is impossible to form a homogeneous system, resulting in long reaction time and low conversion rate; The color is deep, and the use of peroxide decolorizers is likely to cause problems such as unstable product quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 200g of glucose into 160g of N,N-dimethylformamide solution, heat to 60°C, stir and dissolve to obtain a glucose solution, which is ready for use. Take 1g of catalyst (in this catalyst, the molar ratio of methanedisulfonic acid to magnesium methanedisulfonate is 1:1) and 600g of dodecanol are added to a 2000ml four-necked flask with a water separator, and the temperature is raised to At 100°C, the glucose solution was added dropwise to dodecyl alcohol through a constant pressure funnel, the dropping time was controlled at about 1 hour, and the acetalization reaction was started, and the reaction was continued for 5 hours after the dropping was completed. When the reaction solution is clear, observe that there is no water in the water separator for 15 minutes, use Fehling's reagent to determine the end point, cool down to about 70°C, add neutralizing agent MgO, and adjust the pH of the system to 8.0. Turn on the vacuum pump, adjust the vacuum degree to 0.096Mpa, grad...

Embodiment 2

[0019] Add 200g of glucose into 200g of N,N-dimethylformamide solution, heat to 60°C, stir and dissolve to obtain a glucose solution, which is ready for use. Take 2g of catalyst (in this catalyst, the molar ratio of methanedisulfonic acid to magnesium methanedisulfonate is 2:1) and 800g of dodecyl alcohol are added to a 2000ml four-necked flask with a water separator, and the temperature is raised to At 110°C, the glucose solution was added dropwise to dodecyl alcohol through a constant pressure funnel, the dropping time was controlled at about 1 hour, and the acetalization reaction was started, and the reaction was continued for 4 hours after the dropping was completed. When the reaction solution is clear, observe that there is no water produced in the water separator for 15 minutes, use Fehling's reagent to determine the end point, cool down to about 70°C, and add neutralizing agent Mg (HCO 3 ) 2 , adjust the pH of the system to 8.0. Turn on the vacuum pump, adjust the vac...

Embodiment 3

[0021] Add 200 g of glucose into 240 g of N,N-dimethylformamide solution, heat to 55° C., stir and dissolve to obtain a glucose solution, which is ready for use. Take 3g of catalyst (in this catalyst, the molar ratio of methanedisulfonic acid to magnesium methanedisulfonate is 3:1) and 1000g of dodecyl alcohol are added to a 2000ml four-necked flask with a water separator, and the temperature is raised to At 130°C, the glucose solution was added dropwise to dodecyl alcohol through a constant pressure funnel, the dropping time was controlled at about 1 hour, and the acetalization reaction was started, and the reaction was continued for 3 hours after the dropping was completed. When the reaction solution is clear, observe that there is no water produced in the water separator for 15 minutes, use Fehling's reagent to determine the end point, cool down to about 80°C, and add the neutralizing agent Mg(OH) 2 , adjust the pH of the system to 8.0. Turn on the vacuum pump, adjust the ...

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Abstract

The invention relates to a method for preparing dodecyl glucoside by catalyzing a compound organic acid, and belongs to the technical field of alkyl glycoside preparation. Using lauryl alcohol and glucose as raw materials, an acetalization reaction occurs under the catalysis of a compound organic acid to prepare an aqueous solution of dodecyl glucoside. The preparation of dodecyl glucoside by the scheme of the present invention has the advantages of simple process, convenient operation, and high production efficiency. Low cost, stable quality and excellent performance of alkyl glycosides.

Description

technical field [0001] The invention relates to a method for preparing dodecyl glucoside by catalyzing a compound organic acid, and belongs to the technical field of alkyl glycoside preparation. Background technique [0002] Alkyl polyglycoside (APG for short) is a new type of green and environmentally friendly surfactant. It mainly uses renewable resource carbohydrate glucose and long-chain natural fatty alcohol as raw materials, and undergoes acetalization and dehydration reaction under acid catalysis. be made of. The nonionic surfactant has the characteristics of an ionic surfactant, excellent compatibility, excellent ecological and toxicological properties, and outstanding physical and chemical properties, making it widely used in lotions, textile printing and dyeing, plastics, pesticides, medicine, and biochemical industries. It is widely used in many industries. [0003] Dodecyl polyglucoside (dodecyl polyglucoside), the molecular formula is C 18 h 36 o 6 , molecu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H15/04C07H1/00C07H1/06B01J31/02
Inventor 颜吉校金一丰宋明贵郭玉峰沈天维
Owner ZHEJIANG HUANGMA TECH
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