Method for continuous production of alcohol ether glycosides

A continuous technology of alcohol ether glycosides, applied in the field of continuous production of alcohol ether glycosides, can solve the problems of product color deepening, slow reaction speed, high production cost, etc., and achieve the effect of eliminating the influence of impurities, avoiding deposition, and reducing residues

Active Publication Date: 2018-12-18
河北合佳医药科技集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the methods for industrial production of alcohol ether glycosides adopt a one-step method. First, anhydrous glucose and fatty alcohol polyoxyethylene ether compounds are mixed and reacted, then neutralized, and excess fatty alcohol polyoxyethylene ether compounds are removed. After bleaching, 50% alcohol ether glycoside aqueous solution is obtained. The process is simple, the product has high viscosity and high quality. Reaction, the reaction speed is slow, and anhydrous glucose is easy to accumulate at the bottom of the equipment, resulting in low sugar utilization rate and complicated follow-up treatment. The residual sugar in the material will be coked at high temperature during subsequent dealcoholization, which will easily cause the color of the product to deepen
The one-step synthesis method of alcohol ether glycoside reported at present, the color of synthetic crude alcohol ether glycoside is coffee color, red, yellow mostly, and the product can only reach light yellow after bleaching, and can only use anhydrous glucose as raw material, and production cost is relatively high. high

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  • Method for continuous production of alcohol ether glycosides
  • Method for continuous production of alcohol ether glycosides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment relates to a group of methods for the continuous production of alcohol ether glycosides, in figure 1 in the production facility shown.

[0028] Such as figure 1 As shown, the production device for continuous production of alcohol ether glycosides includes a DSC control system 1, and the DSC control system 1 is used to regulate and control the reaction material mixer 2, continuous reactor 3, condenser 4, neutralization reactor 5, And the operation of continuous dealcoholization device 6, product blender 7, and continuous decolorization device 8; described continuous reactor 3 is horizontal, rake type stirring, and is divided into three reaction zones; described continuous dealcoholization device 6 comprises The first-stage scraper film evaporator 9, the second-stage short-range evaporator 10 and the third-stage short-range evaporator 11 arranged in sequence, the continuous decolorization device includes a first-stage decolorization tower 12, a second-sta...

Embodiment 11

[0031]Add anhydrous glucose, C12-14 fatty alcohol polyoxyethylene ether and dodecylbenzenesulfonic acid in a molar ratio of 1:2.5:0.03 to the reaction material mixer, and mix them uniformly under the control of the DSC control system. The reaction raw materials are continuously added to the continuous reactor, under the vacuum degree of 20-30mmHg and the temperature of 120°C, stay for reaction for 4 hours, then enter the condenser to cool down to 50°C, and then enter the neutralization reactor, by continuously adding MgO and hydrogen The mixture of sodium oxide adjusts the pH to 9 to obtain a milky white reaction mixture containing alcohol ether glycosides and fatty alcohol polyoxyethylene ethers. The reaction mixture enters a continuous dealcoholization device, and at a vacuum of 4mmHg and a temperature of 130°C, unreacted C12-14 fatty alcohol polyoxyethylene ether to obtain the product alcohol ether glycoside, add water to prepare a 50% alcohol ether glycoside solution, and f...

Embodiment 12

[0034] Glucose monohydrate, C16-18 fatty alcohol polyoxyethylene ether and p-toluenesulfonic acid are added to the reaction material mixer in a molar ratio of 1:5:0.04. Under the control of the DSC control system, the uniformly mixed reaction raw materials are continuously Add it into the continuous reactor, stay in the reaction for 3 hours at a vacuum of 15-25mmHg and 170°C, then enter the condenser to cool down to 60°C, and then enter the neutralization reactor, by continuously adding the mixture of MgO and sodium hydroxide Adjust the pH to 9.5 to obtain a milky white reaction mixture containing alcohol ether glycosides and fatty alcohol polyoxyethylene ethers. The reaction mixture enters a continuous dealcoholization device to remove unreacted C16-18 fats at a vacuum of 3mmHg and a temperature of 150°C. Alcohol polyoxyethylene ether, the product alcohol ether glycoside is obtained, and water is added to prepare an alcohol ether glycoside solution with a content of 50%, and f...

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Abstract

The invention relates to a method for continuously producing alkyl ethoxy polyglycoside. The method includes: 1) a continuous reaction to anhydrous glucose or glucose monohydrate with a fatty alcohol-polyoxyethylene ether compound, 2) continuous three-stage vacuum distillation alcohol removal treatment including first-stage scraper blade thin film evaporation, second-stage short-range evaporation and third-stage short-range evaporation to remove the fatty alcohol-polyoxyethylene ether compound, and 3) continuous three-stage countercurrent discoloring treatment with ozone as a discoloring agent to produce the alkyl ethoxy polyglycoside which is colorless, transparent, high-purity and high-quality. The alkyl ethoxy polyglycoside is colorless, transparent, high-purity and high-quality, has excellent surface activity and bio-degradability, good water solubility, strong hard water resistance and alkaline resistance, and low production cost. The invention also relates to a production apparatus for continuously producing the alkyl ethoxy polyglycoside. The apparatus has high automation degree and short technical process and is suitable for large-scale industrial production.

Description

technical field [0001] The present invention relates to a production method of alcohol ether glycosides, in particular to a method for continuous production of alcohol ether glycosides, and at the same time, the invention also relates to a production device used in the continuous production of alcohol ether glycosides. Background technique [0002] Alcohol ether glycoside (also known as alcohol ether polyglycoside, referred to as AEG) is a new type of surfactant. It is recognized as a green surfactant in the world because it is non-toxic, harmless and biodegradable. In the molecular structure of alcohol ether glycosides, an EO chain with a certain summation number is embedded between the alkyl chain and the glycogen with a certain degree of polymerization, so its water solubility and hard water resistance are improved compared with those of alkyl glycosides, so it has alcohol ether And the dual excellent properties of alkyl polyglycosides, so it has a wider range of applicat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H15/08C07H1/00
CPCC07H1/00C07H15/08
Inventor 刘振强董永利王荣霞
Owner 河北合佳医药科技集团股份有限公司
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