Synthetic method for high-purity quaternary ammonium salt

A synthesis method and technology of quaternary ammonium salts, applied in chemical instruments and methods, preparation of amino compounds, preparation of organic compounds, etc., can solve the problems of low yield, low production capacity, low purity, etc., and achieve simple process route and short reaction time The effect of shortening and labor cost reduction

Inactive Publication Date: 2013-10-16
安徽奔马先端科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a high-yield, high-purity, efficient quaternary ammonium salt synthesis method for the shortcomings of low yield, low purity, and low production capacity in the existing quaternary ammonium salt synthesis method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 300g of octadecyl dimethyl tertiary amine, add it to a small reaction kettle containing 550g of acetone, then add 61g of methyl chloride to the kettle, keep the temperature in the kettle at 70°C, and stir for 4 hours. Cool to room temperature. Suction filtration obtained 321 g of octadecyltrimethylammonium chloride, with a yield of 91.5%, and the quantitative analysis of octadecyltrimethylammonium chloride content was 99.6%.

Embodiment 2

[0029] Weigh 320g of hexadecyldimethyl tertiary amine, add it to a small reaction kettle filled with 600g of isopropanol, then add 66g of methyl chloride to the kettle, keep the temperature in the kettle at 60°C, stir and react for 4.5 hours, and the reaction is over Then cool down to room temperature naturally. Suction filtration obtained 352 g of cetyltrimethylammonium chloride, the yield was 92.6%, and the content of cetyltrimethylammonium chloride was 99.8% according to quantitative analysis.

Embodiment 3

[0031] Weigh 300g of hexadecyldimethyl tertiary amine, add it into a small reaction kettle filled with 600g of acetone (containing 10% ethyl acetate), then add 111g of methyl bromide into the kettle, keep the temperature in the kettle at 55°C, and stir the reaction After 4 hours, the reaction was naturally cooled to room temperature. Suction filtration obtained 369 g of cetyltrimethylammonium bromide, with a yield of 91%, and the quantitative analysis of cetyltrimethylammonium bromide content was 99.7%.

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PUM

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Abstract

The invention discloses a synthetic method for a quaternary ammonium salt, especially to a synthetic method for a high-purity quaternary ammonium salt. The synthetic method comprises the following steps: adding a certain amount of a solvent, tertiary amine and an alkylation reagent into a reaction vessel with reaction temperature being 20 to 105 DEG C and reaction time being 2 to 24 h; and after a reaction is ended, carrying out direct cooling, centrifugation and drying so as to obtain the high-purity quaternary ammonium salt. The solvent used in the method can be used indiscriminately and repeatedly, so production cost is reduced, and the method has a high industrial practical value.

Description

technical field [0001] The invention mainly relates to the field of synthesis of quaternary ammonium salts, in particular to the field of synthesis of high-purity quaternary ammonium salts. Background technique [0002] As an important chemical raw material, quaternary ammonium salt has been widely used in chemical industry, medicine, mining, printing and dyeing, construction, plastic processing, oil exploitation and other fields. [0003] With the development of science and technology, the application fields of quaternary ammonium salts continue to expand, and the requirements for the purity of quaternary ammonium salts are getting higher and higher. For example, for quaternary ammonium salts used as ionic liquid electrolytes, the halogen content is required to be less than 10ppm; quaternary ammonium salts and their downstream products are used as cleaning agents in the microelectronics industry, where the free amine content is required to be less than 0.03%, metal ions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C209/12C07C209/20C07C209/86C07C211/63
Inventor 邱建兴章晶花林
Owner 安徽奔马先端科技有限公司
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