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Bialkyl methyl ethoxyl quaternary ammonium salt and synthesis method thereof

A technology of alkyl methyl hydroxyethyl and synthesis method is applied in the field of dialkyl methyl hydroxyethyl quaternary ammonium salt and its synthesis, and achieves the effects of excellent biodegradability, short reaction time and good environmental compatibility

Active Publication Date: 2011-05-18
CHINA RES INST OF DAILY CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the use of double long-chain alkylmethyl tertiary amines with hydrochloric acid and ethylene oxide for quaternization to synthesize dialkylmethylhydroxyethyl quaternary ammonium salts, this type of new cationic surfactant has not yet been reported.

Method used

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  • Bialkyl methyl ethoxyl quaternary ammonium salt and synthesis method thereof
  • Bialkyl methyl ethoxyl quaternary ammonium salt and synthesis method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Weigh double C 10 Put 63g of alkylmethyl tertiary amine, 30g of water, and 60g of absolute ethanol into a four-neck flask; weigh 45g of hydrochloric acid with a mass concentration of 20%, and put it into a constant pressure dropping funnel. Under the condition of stirring and keeping the temperature at 30°C, hydrochloric acid was slowly added dropwise into the four-necked flask for 30 minutes. When the hydrochloric acid was added dropwise, the stirring was continued for 10 min. The resulting product was put into the autoclave, and the 2 Replace 3 times. Under the condition of constant stirring, the temperature was raised to 60° C., and then 10 g of ethylene oxide was introduced, reacted for 1.5 h under a pressure of 0.15 MPa, and aged for 2 h. Finally, the content of the quaternary ammonium salt active substance in the product was measured to be 36.3%.

Embodiment 2

[0020] Weigh double C 12 Put 100 g of alkylmethyl tertiary amine, 70 g of water, and 80 g of methanol into a four-neck flask; weigh 50 g of hydrochloric acid with a mass concentration of 20%, and put it into a constant pressure dropping funnel. Under the condition of stirring, the reaction temperature was kept at 40° C., and hydrochloric acid was slowly added dropwise into the four-neck flask for 20 minutes. When the hydrochloric acid is added dropwise, continue to stir for 10 min, then put the resulting product into the autoclave, and use N 2 Replace 3 times. Under the condition of constant stirring, the temperature was raised to 50° C., 15 g of ethylene oxide was passed through, the reaction was carried out under the pressure of 0.05 MPa for 1 h, and the aging was continued for 2 h. Finally, the content of the quaternary ammonium salt active substance in the product was measured to be 37.5%.

Embodiment 3

[0022] Weigh double C 12～14 Put 73g of alkylmethyl tertiary amine, 40g of water, and 60g of isopropanol into a four-neck flask; weigh 25g of hydrochloric acid with a mass concentration of 35%, and put it into a constant pressure dropping funnel. Under the condition of stirring and keeping the temperature at 35°C, hydrochloric acid was slowly added dropwise into the four-necked flask for 60 minutes. When the hydrochloric acid is added dropwise, continue to stir for 10 min. The resulting product is put into the autoclave, and 2 Replace 3 times. Under the condition of constant stirring, the temperature was raised to 70° C., and then 9 g of ethylene oxide was introduced, reacted for 0.5 h under a pressure of 0.15 MPa, and aged for 2 h. Finally, the content of the quaternary ammonium salt active substance measured in the product is 38.7%.

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Abstract

The present invention is one kind of bisalkyl methyl ethoxyl quaternary ammonium salt and its synthesis process. The bisalkyl methyl ethoxyl quaternary ammonium salt has a structural formula as follows. In the formula, R is C8-C18 saturated or unsaturated alkyl with straight chain or branched chain. The process has short reaction period, low temperature and low pressure; and the bisalkyl methyl ethoxyl quaternary ammonium salt has high biodegradability, low ecological toxicity and environmental compatability.

Description

technical field [0001] The present invention belongs to a kind of quaternary ammonium salt and its synthesis method, specifically utilizes two long-chain alkyl methyl tertiary amines to react with hydrochloric acid and ethylene oxide to synthesize a kind of dialkyl methyl hydroxyethyl quaternary ammonium salt and its synthesis method. Background technique [0002] Quaternary ammonium salts are a very important class of cationic surfactants, which are widely used in detergents, bactericides, antistatic agents, fabric softeners, mineral flotation agents and asphalt emulsifiers, metal corrosion inhibitors and phase transfer catalysts, etc. , It is widely used in textile printing and dyeing, plastic processing, medical and health care, daily chemical industry, petroleum processing, metal processing and other industries. At present, there are many methods for synthesizing quaternary ammonium salts, mainly including the methyl chloride method, the benzyl chloride method, and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C215/40C07C213/08
Inventor 李秋小孙记夫李运玲
Owner CHINA RES INST OF DAILY CHEM IND
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