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Method for synthesizing natrium sarkosine from methyl - ethanolamine

A technology of methyl monoethanolamine and sodium sarcosinate, which is applied in the field of synthesis of daily chemical raw materials, can solve the problems of low product quality, high production cost, and many "three wastes" pollution, and achieve the effect of simple post-processing

Inactive Publication Date: 2007-07-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of low product quality, high production cost, high pollution of "three wastes" and the use of highly toxic chemicals in the existing production of sodium sarcosinate, and propose a synthetic sarcosine with methyl monoethanolamine sodium acid method

Method used

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  • Method for synthesizing natrium sarkosine from methyl - ethanolamine

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Experimental program
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Effect test

Embodiment 1

[0027] 100 parts by weight of methyl monoethanolamine and 150 parts by weight of deionized water are dropped into a high-pressure stainless steel reactor, 30% liquid caustic soda of 100 parts by weight is added, and the skeleton copper catalyst of trace metal modification of 5 parts by weight is added, at 140 ℃, 0.6MPa pressure, react for 8 hours, there will be H during the reaction 2 Generated, enter H through decompression, scrubbing, drying and other processes 2 storage tank. H generated by metering 2 Quantity, to judge the degree of conversion of methyl ethanolamine, to determine the termination of the reaction. Cool down to about 50°C, then release residual H 2 .

[0028] The crude product was left overnight. Suck out the upper layer liquid, and then filter out a small amount of catalyst particles to obtain the product sodium sarcosinate (sodium methylglycinate).

Embodiment 2

[0030] 100 parts by weight of methyl monoethanolamine and 250 parts by weight of deionized water are dropped into a high-pressure stainless steel reactor, 30% liquid caustic soda of 150 parts by weight is added, and a trace metal-modified skeleton copper catalyst of 10 parts by weight is added, at 160 ℃, 1.0MPa pressure, react for 6 hours, there will be H during the reaction 2 Generated, enter H through decompression, scrubbing, drying and other processes 2 storage tank. H generated by metering 2 Quantity, to judge the degree of conversion of methyl ethanolamine, to determine the termination of the reaction. Cool down to about 50°C, then release residual H 2 .

[0031] The crude product was left overnight. Suck out the upper layer liquid, and then filter out a small amount of catalyst particles to obtain the product sodium sarcosinate (sodium methylglycinate).

Embodiment 3

[0033] 100 parts by weight of methyl monoethanolamine and 300 parts by weight of deionized water are dropped into a high-pressure stainless steel reactor, 30% liquid caustic soda of 200 parts by weight is added, and the skeleton copper catalyst of trace metal modification of 15 parts by weight is added, at 200 ℃, 1.5MPa pressure, react for 3 hours, there will be H during the reaction 2 Generated, enter H through decompression, scrubbing, drying and other processes 2 storage tank. H generated by metering 2 Quantity, to judge the degree of conversion of methyl ethanolamine, to determine the termination of the reaction. Cool down to about 50°C, then release residual H 2 .

[0034] The crude product was left overnight. Suck out the upper layer liquid, and then filter out a small amount of catalyst particles to obtain the product sodium sarcosinate (sodium methylglycinate).

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Abstract

This invention relates to a method for synthesizing sodium sarcosinate from methyl monoethanolamine. The method comprises: adding methyl monoethanolamine 100 parts with deionized water 150-300 parts, lye 100-200 parts and metal-modified Cu framework catalyst (200-400 mesh) 5-15 parts, performing catalytic dehydrogenation reaction at 120-200 deg.C and 0.5-1.5 MPa for 2-8 h. The method does not produce NaCl during reaction, thus has simple post-treatment, and can be used to prepare daily chemical and pharmaceutical products. Besides, the method is harmless to operators and environment. The byproduct H2 can be recycled. The raw material, methyl monoethanolamine, is a byproduct of methyl diethanolamine preparation.

Description

technical field [0001] The invention relates to a method for synthesizing chemical raw materials for daily use, in particular to a method for synthesizing sodium sarcosinate from methyl monoethanolamine. Background technique [0002] Sodium sarcosinate, also known as sodium methylglycine, is the main raw material for the synthesis of fatty acyl sarcosinate anionic surfactants. It is mainly used in personal care products such as shampoo, shower gel, toothpaste, etc. Its advantage is non-irritating Non-toxic, easily biodegradable. [0003] Creatine can be synthesized from sodium sarcosinate, which is a sports nutrition agent that can be used for nutritional supplements, heart disease treatment, anti-aging, health care and other functions. [0004] The methods for synthesizing sodium sarcosinate mainly include: [0005] 1) Chloroacetic acid method, namely chloroacetic acid and methylamine react under the presence of NaOH, the shortcoming of this method is: by-product NaCl sal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C227/02C07C229/10
Inventor 蔡振云
Owner ZHEJIANG UNIV
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