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Method for synthesizing aliphatic alcohol polyethenoxy ether carboxylate

A technology of alcohol polyoxyethylene ether carboxylate and alcohol polyoxyethylene ether, which is applied in the field of synthesis of anionic surfactants in organic chemistry, and can solve the problem that by-product water and inorganic salt are not easily removed, the product conversion rate is not high, and the process Complicated and other problems, to achieve the effect of high conversion rate, low equipment investment and simple process

Inactive Publication Date: 2009-08-05
ZHEJIANG HUANGMA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no matter which method has the following problems: the conversion rate of the product is not high, the by-product water and inorganic salts of the product are not easy to remove, and the process is complicated and costly.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Weigh 1000mol of dodecyl alcohol polyoxyethylene (3) ether, 1000kg of sodium ethoxide in a reactor, heat up to 50-80°C, slowly add 1000mol of sodium chloroacetate, react for 10.0h, add sodium hydroxide and ethanol Adjust the pH value of the solution to be neutral, dissolve the product in hot ethanol, filter while hot to remove the inorganic salt, and dry in vacuum to obtain sodium lauryl lauryl alcohol polyoxyethylene (3) ether acetate as a white solid.

[0021] The reaction equation of above-mentioned embodiment is:

[0022] C 12 h 25 O(CH 2 CH 2 O) 3 H+ClCH 2 COONa+C 2 h 5 ONa→

[0023] C 12 h 25 O(CH 2 CH 2 O) 3 CH 2 COONa+C 2 h 5 OH+NaCl

Embodiment 2

[0024] Example 2: Weigh 1,000 mol of stearyl polyoxyethylene (25) ether, 2,000 mol of potassium ethylate in a reactor, heat up to 50-80° C., slowly add 2,000 mol of potassium chloroacetate, react for 6.0 h, add potassium hydroxide ethanol Adjust the pH value of the solution to be neutral, dissolve the product in hot ethanol, filter while hot to remove the inorganic salt, and dry in vacuum to obtain potassium acetate of stearyl polyoxyethylene (25) ether as a white solid.

[0025] The reaction equation of above-mentioned embodiment is:

[0026] C 18 h 25 O(CH 2 CH 2 O) 25 H+ClCH 2 COOK+C 2 h 5 OK→

[0027] C 18 h 25 O(CH 2 CH 2 O) 25 CH 2 COOK+C 2 h 5 OH+KCl

Embodiment 3

[0028] Example 3: Weigh 1000mol tetradecyl polyoxyethylene (10) ether, 1500mol potassium ethylate in a reactor, heat up to 50-80°C, slowly add 1500mol sodium chloroacetate, react for 4.0h, add sodium hydroxide ethanol Adjust the pH value of the solution to be neutral, dissolve the product in hot ethanol, filter while hot to remove inorganic salts, and dry in vacuo to obtain sodium tetradecyl alcohol polyoxyethylene (10) ether acetate as a white solid.

[0029] The reaction equation of above-mentioned embodiment is:

[0030] C 14 h 25 O(CH 2 CH 2 O) 10 H+ClCH 2 COONa+C 2 h 5 OK→

[0031] C 14 h 25 O(CH 2 CH 2 O) 10 CH 2 COONa+C 2 h 5 OH+KCl

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Abstract

The invention provides a method for synthesizing fatty alcohol-polyoxyethyleneether carboxylate, which belongs to the technical field of synthesis of an anion surfactant in organic chemistry. The method uses fatty alcohol-polyoxyethyleneether and chloracetate as raw materials, leads the fatty alcohol-polyoxyethyleneether to perform a carboxy methylation reaction by a new catalyst under protection of inert gas, adds an ethanol solution of an alkali metal hydroxide after reaction so as to adjust the range of pH, and filters the pure fatty alcohol-polyoxyethyleneether carboxylate obtained after inorganic salt is dried in the ethanol, wherein the new catalyst can be sodium alcoholate and / or kalium alcoholate; and a ratio of the catalyst to the pure fatty alcohol-polyoxyethyleneether by weight can be 1:1.0-2.0. The method adopts the new high-efficiency catalyst with high conversion rate of the product, and can obtain the pure fatty alcohol-polyoxyethyleneether carboxylate. Compared with the prior method, the method has a more advanced and reasonable process, and saves equipment investment.

Description

technical field [0001] The invention relates to a synthesis method of fatty alcohol polyoxyethylene ether carboxylate, which belongs to the technical field of synthesis of anionic surfactants in organic chemistry. Background technique [0002] Fatty alcohol polyoxyethylene ether carboxylate is a new type of anionic surfactant, which is modified by nonionic surfactant, so it has many excellent characteristics that traditional anionic and nonionic surfactants do not have , known as a new class of green surfactants. [0003] The chemical structure of fatty alcohol polyoxyethylene ether carboxylate can be expressed as: [0004] RO(CH 2 CH 2 O) n CH 2 COOM (M is an alkali metal element) [0005] Because its molecular structure contains both polyoxyethylene and carboxymethyl groups, it has the characteristics of both nonionic and anionic surfactants, and a certain surface characteristic of the product can be changed by changing the length of the hydrophobic group chain (R), ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C59/125C07C51/353C08G65/332B01F17/44C09K23/44
Inventor 王伟松王新荣孟照平李福强
Owner ZHEJIANG HUANGMA TECH
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