Method for synthesizing N-acyl-N-methyl taurine salt through microwave

A technology of methyl taurine and microwave synthesis, applied in the preparation of sulfonate, organic chemistry, etc., can solve the problems of large environmental pollution and high cost, and achieve the effects of good selectivity, short reaction time and little skin damage

Active Publication Date: 2017-04-26
HUBEI GRAND LIFE SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a new method for the synthesis of N-acyl-N-methyl taurate with easy-to-get raw materials, mild reaction conditi

Method used

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  • Method for synthesizing N-acyl-N-methyl taurine salt through microwave

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Weigh 2.1g (10.5mmol) of lauric acid and 1.61g (10mmol) of sodium N-methyl taurate, add them into a microwave tube, put them in a 600W microwave oven, and react at 100°C for 60min. After the reaction is completed, cool to 20 ℃, add 5mL of 95% ethanol to beat, filter with suction, wash with 3x3mL of 95% ethanol, and dry to obtain 3.46g of N-lauroyl-N-methyl taurine sodium, the yield is 95.8%, and the product purity is 99.1 %.

Embodiment 2

[0031] Weigh 3.43g (15mmol) of myristic acid and 1.78g (10mmol) of potassium N-methyl taurate, put them into a microwave tube, put them in a 600W microwave oven, and react at 200°C for 20min. After the reaction is completed, cool to 10°C , add 10mL of 95% ethanol to beat, filter with suction, wash with 3x5mL of 95% ethanol, and dry to obtain 3.81g of potassium N-myristoyl-N-methyl taurate, with a yield of 94% and a product purity of 99% .

Embodiment 3

[0033] Weigh 3.08g (12mmol) of palmitic acid and 1.56g (10mmol) of N-methylammonium taurate, put them into a microwave tube, put them in a 600W microwave oven, and react at 150°C for 35min. After the reaction is completed, cool to 0°C , add 10mL of 90% ethanol to beat, filter with suction, wash with 3x5mL of 90% ethanol, and dry to obtain 3.96g of potassium N-palmitoyl-N-methyl taurate, with a yield of 96% and a product purity of 99.2% .

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Abstract

The invention relates to the field of chemical synthesis, and in particular to a method for synthesizing N-acyl-N-methyl taurine salt through microwave. The method comprises the following steps: with C8-18 fatty acid and N-methyl taurine salt as raw materials, directly synthesizing the N-acyl-N-methyl taurine salt by conducting microwave heating under a solvent-free condition; cooling the N-acyl-N-methyl taurine salt; pulping the cooled N-acyl-N-methyl taurine salt with 90-100% ethanol; filtering obtained pulp; then washing the pulp with 90-100% ethanol; and conducting vacuum drying so as to obtain a pure product. The method is easily available in raw materials, mild in reaction conditions, green and environment-friendly, simple and efficient, and the method is applicable to industrial production.

Description

technical field [0001] The invention relates to the field of chemical synthesis, in particular to a method for synthesizing N-acyl-N-methyl taurate using microwaves. Background technique [0002] N-acyl-N-methyl taurate belongs to anionic surfactant, which has excellent washing, wetting, emulsifying and softening abilities, and the foam is rich, fine and stable. It has good detergency and emulsification performance, hard water resistance, acid and alkali resistance, and good compatibility with anionic, nonionic and amphoteric surfactants. This kind of surfactant is green, safe, easy to biodegrade, mild in nature, contains hydrophilic amino acid structure, and has very little irritation to the skin. [0003] Most of the currently reported synthesis of N-acyl-N-methyl taurate is to make fatty acid chlorides, react under alkaline conditions, and obtain products after post-treatment. This type of method will produce a large amount of acidic waste water in the process of prepar...

Claims

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Application Information

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IPC IPC(8): C07C303/32C07C309/15
CPCC07C303/32C07C309/15
Inventor 张邦国孙华君杨长云刘年金张军桥金军民
Owner HUBEI GRAND LIFE SCI & TECH CO LTD
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