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Preparation of alkyl trimethyl quaternary ammonium salt

A technology of alkyl trimethyl quaternary ammonium salt and quaternary ammonium salt, applied in the direction of condensation/addition reaction to prepare amino compounds, organic chemistry, etc., can solve the problems of product residual toxicity, environmental pollution, etc., to avoid toxic raw material residue, Reduce the toxicity of the human body, the effect of excellent surface activity

Inactive Publication Date: 2009-02-25
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of traditional synthetic methods to environmental pollution and residual toxicity of products, to provide a kind of nontoxic synthetic monomethyl

Method used

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  • Preparation of alkyl trimethyl quaternary ammonium salt
  • Preparation of alkyl trimethyl quaternary ammonium salt
  • Preparation of alkyl trimethyl quaternary ammonium salt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 21g of dodecyldimethyl tertiary amine and 18g of dimethyl carbonate, add them into a 100mL reaction kettle, slowly raise the temperature to 105°C, and stir for 2h. After the reaction was completed, it was naturally cooled to room temperature, and the product was collected and recrystallized to obtain ammonium dodecyltrimethylammonium carbonate as a white solid. Weigh 3 g of ammonium dodecyl trimethyl methyl carbonate and 10 g of water, add them into a 50 mL flask, and stir at 30°C for 5 h. After the reaction was completed, it was concentrated and recrystallized to obtain a white solid of dodecyltrimethylammonium bicarbonate.

Embodiment 2

[0021] Weigh 12g of octadecyldimethyl tertiary amine and 16g of dimethyl carbonate, add them into a 500mL reaction kettle, slowly raise the temperature to 110°C, and stir for 3h. After the reaction was completed, it was naturally cooled to room temperature, and the product was collected and recrystallized to obtain octadecyl trimethyl ammonium methyl carbonate as a white solid. Weigh 4g of ammonium octadecyltrimethylmethyl carbonate and 9g of water into a 50mL flask, and stir at 30°C for 5h. After the reaction was completed, it was concentrated and recrystallized to obtain a white solid of octadecyltrimethylammonium bicarbonate.

Embodiment 3

[0023] Weigh 15g of dodecyldimethyl tertiary amine and 16g of dimethyl carbonate, add them into a 100mL reaction kettle, slowly raise the temperature to 105°C, and stir for 2h. After the reaction was completed, it was naturally cooled to room temperature, and the product was collected and recrystallized to obtain ammonium dodecyltrimethylammonium carbonate as a white solid. Weigh 5g of ammonium dodecyltrimethylmethyl carbonate and 1g of acetic acid, add them into a 50mL flask filled with 10mL of methanol, and stir at 35°C for 4h. After the reaction, methanol was distilled off under reduced pressure, and recrystallized to obtain dodecyltrimethylammonium acetate as a white solid.

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Abstract

A method for preparing alkyl trimethyl quaternary ammonium salt belongs to the technical field of organic compound synthesis. In the preparation method, methyl carbonate is taken as a quaternizing reagent to synthesize monomethyl-carbonate quaternary ammonium salt, and the quaternary ammonium salt with other counter ions is synthesized by hydrolysis reaction or displacement reaction with various acids (alkalis). The preparation method has the advantages of no environmental pollution or toxin residue, and the product prepared by the method is widely applied to the field of daily chemicals and other industrial fields.

Description

technical field [0001] The invention relates to a preparation method for synthesizing alkyl trimethyl quaternary ammonium salts with novel counter ions using dimethyl carbonate as a quaternizing agent. Background technique [0002] The traditional synthesis methods of alkyl trimethyl quaternary ammonium salts mostly use methyl chloride, methyl bromide, dimethyl sulfate, etc. as quaternizing reagents. These traditional quaternizing reagents have certain toxicity and corrosiveness, and the reaction process consumes a large amount , there is a serious environmental pollution problem, and the products prepared with these quaternization reagents will have a certain degree of toxic residue, which will cause certain harm to the human body when used in daily chemicals. [0003] As a new type of green organic chemical raw material, dimethyl carbonate can replace traditional methylation reagents such as dimethyl sulfate, methyl chloride, and methyl bromide, and can undergo methylation...

Claims

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Application Information

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IPC IPC(8): C07C211/63C07C209/60
Inventor 徐宝财周雅文水金环韩富
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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