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Dialkyl dimethyl quaternary ammonium salt and preparation method thereof

A technology of dialkyl dimethyl quaternary ammonium salt and dialkyl dimethyl ammonium carbonate is applied in the preparation of amino-substituted functional groups, the preparation of amino compounds from amines, organic chemistry, etc., which can solve the residual toxicity and is difficult to prepare other Acid anion quaternary ammonium salt, environmental pollution products and other problems, to achieve the effect of excellent surface activity

Active Publication Date: 2012-02-15
CHINA RES INST OF DAILY CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method to synthesize green dimethyl carbonate as a quaternizing agent for the disadvantages of environmental pollution, product residual toxicity and difficulty in preparing other anion quaternary ammonium salts in the traditional quaternary ammonium salt preparation method. Dialkyl dimethyl ammonium methyl ammonium carbonate intermediate, and use it as raw material to synthesize dialkyl dimethyl quaternary ammonium salt with inorganic acid radical or organic acid radical anion and preparation method

Method used

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  • Dialkyl dimethyl quaternary ammonium salt and preparation method thereof
  • Dialkyl dimethyl quaternary ammonium salt and preparation method thereof
  • Dialkyl dimethyl quaternary ammonium salt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 118g of trimethyl tertiary amine, 180.0g of dimethyl carbonate and 14.9g of methanol into the reaction kettle, slowly raise the temperature to 80°C, and stir for 3h. After the reaction, methanol and dimethyl carbonate were distilled off under reduced pressure to obtain tetramethyl ammonium methyl carbonate. Weigh 14.9g of tetramethylammonium methylammonium carbonate and 14.9g of water, add them into the flask, and stir and react at 30°C for 0.5h. After the reaction was finished, the tetramethylammonium bicarbonate product was obtained after the solvent was removed by distillation.

Embodiment 2

[0024] Weigh 143g of bis-butylmethyl tertiary amine, 180g of dimethyl carbonate and 32.3g of methanol, add them into the reaction kettle, slowly raise the temperature to 100°C, and stir for 5h. After the reaction, methanol and dimethyl carbonate were distilled off under reduced pressure to obtain dibutyl dimethyl ammonium methyl carbonate. Weigh 23.3g of dibutyldimethylammonium methyl ammonium carbonate, 7g of n-propanol and 10.1g of hydrochloric acid, add them into a flask, and stir at 30°C for 0.5h. After the reaction is finished, the dibutyl dimethyl ammonium chloride product is obtained after distilling off the solvent.

Embodiment 3

[0026] Weigh 127.5g bis-octaalkylmethyl tertiary amine, 225g dimethyl carbonate and 32.5g methanol, add them into the reaction kettle, slowly raise the temperature to 110°C, and stir for 6h. After the reaction was completed, methanol and dimethyl carbonate were distilled off under reduced pressure to obtain bis-octaalkyl dimethyl ammonium methyl carbonate. Weigh 34.5g of bis-octaalkyldimethylammonium methyl ammonium carbonate, 27.6g of absolute ethanol and 9.0g of sulfuric acid, add them into the flask, and stir and react at 40°C for 1.5h. After the reaction was finished, the dicarbon octaalkyl dimethyl ammonium bisulfate product was obtained after the solvent was removed by distillation.

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Abstract

The invention relates to dialkyl dimethyl quaternary ammonium salt, which has the following chemical structure as shown in the accompanying drawing. In the formula, R1 or R2 is identical or different C1 to C2 alkyls, identical or different C3 to C22 saturated or unsaturated strain chain alkyls and saturated or unsaturated branch chain alkyls, A<-> is methyl carbonate radical, bicarbonate radical, halogen ion, hydrogen sulfate radical, dihydrogen phosphate radical, nitrate radical, nitrite radical, perchlorate radical, permanganate radical, oxacid radical, acetate radical, malonate radical, lactate radical, butyrate radical, glutaconate radical, adipate radical, pimelate radical, azelate radical, quinate radical, undecandioate radical, dodecanoate radical, tridecanoic acid radical, tetradecanoic acid radical, pentadecanoic acid radical, palmitate radical, hexadecenoic acid radical, stearate radical or oleate radical. The dialkyl dimethyl quaternary ammonium salt has the advantages that no pollution is caused on the environment, the dialkyl dimethyl quaternary ammonium salt with the acid radical anions can be synthesized, and the surface activity higher than that of the traditional quaternary ammonium salt can be obtained.

Description

technical field [0001] The invention relates to a method for synthesizing dialkyl dimethyl quaternary ammonium salt with methyl carbonate quaternary ammonium salt as an intermediate. Background technique [0002] Dialkyl dimethyl quaternary ammonium salt has been more and more used in various fields such as daily chemical industry, textile, printing and dyeing, asphalt, construction, plastic processing, oil exploration, petrochemical industry, etc. At present, the quaternizing agents used in the industry to prepare cationic quaternary ammonium salts using tertiary amines as raw materials are mainly halomethane and dimethyl sulfate, which are highly toxic chemicals, which will not only cause great harm to human health, but also cause serious harm during reaction. A large amount of alkali is required to neutralize the by-products of the reaction, causing equipment corrosion and a large amount of waste salt. Simultaneously in existing quaternary ammonium salt preparation metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C211/63C07C209/68C07C209/22
Inventor 耿涛姜亚洁李秋小罗毅董万田
Owner CHINA RES INST OF DAILY CHEM IND
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