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Process for preparing modified fatty alcohol polyethenoxy ether

The technology of alcohol polyoxyethylene ether and fatty alcohol ether is applied in the field of preparation of nonionic surfactants, which can solve the problems of low practical value and potential safety hazards, and achieves outstanding easy biodegradability, and the preparation method is simple and easy to operate. , the effect of good surface activity

Inactive Publication Date: 2007-05-23
CHINA RES INST OF DAILY CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high melting point properties of glycosides, the preparation process of alcohol ether carboxylates is not suitable for the carboxymethylation of glycosides. Japanese patent JP03287595 introduces the process technology for the preparation of glycoside carboxylates using solvent systems such as dioxane, but this technology Toxic solvents are used in large quantities, with little practical value and potential safety hazards

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 0.8 mol C 12-16 Add fatty alcohol polyoxyethylene ether (the average EO number is 4.6), 0.2 mole of anhydrous glucose and 1 g of p-toluenesulfonic acid into the reactor, stir and heat to 120°C, react at a system pressure of 20mmHg and 120°C for 4hrs, and cool down to 80°C, add 0.25g NaOH for neutralization, and then settle to remove unreacted granular sugar to obtain glycosidated modified alcohol ether (MEG 4641 ). 0.3 moles of the above-mentioned glycosidation modified alcohol ether MEG 4641 Make a solution with 0.2 moles of chloroacetic acid, put it into a constant pressure dropping funnel and store it for later use. Add 0.5 mole of glycosylated modified alcohol ether MEG to the four-necked glass flask reactor 4641 , install a stirrer, a thermometer, a distillation head, a condenser tube, a receiving bottle, and a temperature-regulating electric heating mantle, add 0.4 mole of sodium hydroxide aqueous solution under stirring conditions, and heat up to 100 ° C under...

Embodiment 2

[0023] 0.9 mol C 12-14 Add fatty alcohol polyoxyethylene ether (average EO number is 6), 0.3 mole of anhydrous glucose and 2 g of p-toluenesulfonic acid into the reactor, stir and heat to 110°C. React at a system pressure of 10mmHg and 110°C for 4hrs, cool down to 90°C, add 0.5g NaOH for neutralization, and then filter out unreacted granular sugars to obtain glycosylated modified alcohol ethers (MEG 6031 ). 0.2 moles of the above-mentioned glycosidation modified alcohol ether MEG 6031 Prepare a solution with 0.1 mole of chloroacetic acid, put it into a constant pressure dropping funnel and seal it up for later use. Add 0.7 moles of the above-mentioned glycosidation modified alcohol ether MEG in the four-necked glass flask reactor 6031 , install a stirrer, thermometer, distillation head, condenser tube, receiving bottle, and temperature-regulating electric heating mantle, add 0.2 mole of sodium hydroxide aqueous solution under stirring conditions, and heat up to 105 ° C unde...

Embodiment 3

[0025] 1.0 mol C 12-16 Add fatty alcohol polyoxyethylene ether (average EO number is 4), 0.2 mole of anhydrous glucose and 0.9 g of dodecylbenzenesulfonic acid into the reactor, stir and heat to 130°C. React at a system pressure of 30mmHg and 130°C for 3hrs, cool down to 80°C, add 0.15g NaOH to neutralize, and then settle to remove unreacted granular sugars to obtain glycosidated modified alcohol ethers (MEG 4051 ). 0.3 mole glycosidation modified alcohol ether MEG 4051 Prepare a solution with 0.3 mole of chloroacetic acid, put it into a constant pressure dropping funnel and seal it up for later use. Add 0.7 moles of the above-mentioned glycosidation modified alcohol ether MEG in the four-necked glass flask reactor 4051 , install a stirrer, a thermometer, a distillation head, a condenser tube, a receiving bottle, and a temperature-regulating electric heating mantle, add 0.6 mole of sodium hydroxide aqueous solution under stirring conditions, and heat up to 110 ° C under vac...

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PUM

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Abstract

This invention relates to a preparation method for modified fatty alcohol polyoxyethylene ether. The said method includes carrying out a glucosidation reaction of glucose with fatty alcohol ether in the presence of acid catalyst and under vacuum condition, adding NaOH to pH of 8~9, filtrating and precipitating to remove unreacted sugar to obtain modified alcohol ether glucoside, preparing chloroacetic acid modified ether solution of modified alcohol ether glucoside and chloroacetic acid at a molar ratio of 1~2:1, stirring and adding sodium hydroxide into the remaining modified alcohol ether glucoside, heating to 100-110degreeC under vacuum condition and hydrating for 1~2 hours, cooling and adding chloroacetic acid modified alcohol ether solution, maintaining the reaction temperature at 40~90degreeC, and reacting for 2~4 hours to obtain carboxymethylated modified fatty alcohol polyoxyethylene ether. The method has the advantages of easy operation and low cost.

Description

technical field [0001] The invention belongs to a preparation method of a nonionic surfactant, in particular to the preparation of a narrowly distributed fatty alcohol polyoxyethylene ether (hereinafter referred to as a fatty alcohol ether) with a lower adducting number through glycosidation and carboxymethylation modification No cloud point narrow distribution modified fatty alcohol polyoxyethylene ether. Background technique [0002] With the increasing shortage of petroleum resources, the surfactant industry, like other industries in the world, is facing an urgent need to change the source of raw materials and the development model. The use of renewable resources to alleviate the industry's dependence on petroleum products, the development of clean production technology, and the road to sustainable development have become the inevitable direction of industry development. At the same time, most of the new surfactants obtained from natural and renewable raw materials are e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H15/08
Inventor 杨秀全孙冈剑
Owner CHINA RES INST OF DAILY CHEM IND
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