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Quaternary ammonium salt in ester-amines and synthetic method

A synthesis method and technology of quaternary ammonium salts, applied in chemical instruments and methods, preparation of organic compounds, preparation of amino hydroxyl compounds, etc., to achieve excellent environmental compatibility and skin compatibility, improve grades, and facilitate use

Inactive Publication Date: 2005-01-12
CHINA RES INST OF DAILY CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report for using dimethyl carbonate as quaternizing agent to synthesize esteramine quaternary ammonium salt

Method used

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  • Quaternary ammonium salt in ester-amines and synthetic method
  • Quaternary ammonium salt in ester-amines and synthetic method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 284g of stearic acid and add it to a 500mL four-necked bottle, stir and heat up to 100°C under N2 atmosphere, after all of them are melted, add 1g of alkylbenzenesulfonic acid and 75g of triethanolamine, and heat up to 180°C, The stirring speed was increased, and after 6 hours of reaction, the acid value of the product was measured to be 2.8 mgKOH / g, and the reaction was terminated.

[0026] Cool the reaction mixture to 80°C, stop feeding N 2 gas, add isopropanol 30g, dimethyl carbonate 45g to carry out quaternization reaction, react for 3 hours, record free amine content in the product is 1.8%, can stop reaction.

Embodiment 2

[0028] Take by weighing 284g stearic acid and join in the four-hole bottle of 500mL, under N 2 Stir under atmospheric conditions and heat up to 100°C. After all of them are melted, add 1g of alkylbenzenesulfonic acid and 60g of methyldiethanolamine, raise the temperature to 170°C, increase the stirring speed, and measure the acid value of the product after 7 hours of reaction. When it was 2.6 mgKOH / g, the reaction was terminated.

[0029] Cool the reaction mixture to 80°C, stop feeding N 2 gas, add isopropanol 30g, dimethyl carbonate 45g to carry out quaternization reaction, react for 2.5 hours, when the free amine content in the product is measured to be 1.7%, the reaction can be stopped.

Embodiment 3

[0031] Take by weighing 282g oleic acid and join in the 500mL four-necked bottle, under N 2 Stir under atmospheric conditions and heat up to 90°C, add 1g of alkylbenzenesulfonic acid and 75g of triethanolamine, raise the temperature to 160°C, increase the stirring speed, and react after 6 hours, when the acid value of the product is 3.0mgKOH / g, stop reaction.

[0032] Cool the reaction mixture to 60°C, stop feeding N 2 Gas, add isopropanol 30g, dimethyl carbonate 45g carries out quaternization reaction, after reacting for 3 hours, when recording free amine content in the product is 1.6%, can stop reaction.

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Abstract

In this invention, fatly acid and ethanolamine are proportioned and under ester-aminated, then reacting with dimethyl carbonate to produce ester-amine type quaternary ammonium salt. Said invention p rocess of synthesis has high transforming rate, excellent selectivity, high content of active matter in said product, utilizing no pollution type raw material of dimethyl carbonate, so, no remaining of poison in product, lowering quaternary ammonium salt pollution to environment and to human health.

Description

Technical field: [0001] The invention belongs to an ester amine quaternary ammonium salt and a synthesis method thereof, in particular to a synthesis of an ester amine quaternary ammonium salt compound using a quaternizing agent and a synthesis method thereof. Background technique: [0002] At present, fabric softeners are mainly cationic surfactants. The first softener used commercially in 1950 was dihydrogenated tallow dimethyl amine chloride (DHTDMAC). While developing DHTDMAC, it was developed with fatty acids as raw materials. Products include diamidoethoxylated quaternary ammonium salts, ester quaternary ammonium salts, imidazoline quaternary ammonium salts and other products. However, these quaternary ammonium salt synthesis processes generally use methyl chloride, dimethyl sulfate, dipropyl sulfate or inorganic acids as quaternizing agents. There is no report for using dimethyl carbonate as the quaternizing agent to synthesize esteramine quaternary ammonium salts. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C213/00C07C219/02
Inventor 耿涛李秋小李运玲
Owner CHINA RES INST OF DAILY CHEM IND
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