Synthesis process of ester quaternary ammonium salt

The technology of an ester quaternary ammonium salt and a synthesis method is applied in the synthesis field of the ester quaternary ammonium salt, and achieves the effects of good selectivity, low ecological toxicity and improved grades

Inactive Publication Date: 2007-08-22
SOLVAY ZHANGJIAGANG SPECIALTY CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no report for the method of using continuous method solvent-free synthesis of ester quaternary ammonium salt

Method used

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  • Synthesis process of ester quaternary ammonium salt
  • Synthesis process of ester quaternary ammonium salt

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Take by weighing 840g stearic acid and join in the four-necked bottle of 2000mL, under N 2 Under atmospheric conditions, stir and heat up to 80°C. After all of them are melted, add 2g of phosphorous acid and 248g of triethanolamine, stir and heat up to 155°C. After 9 hours of heat preservation, the acid value of the product is measured to be 2.5mgKOH / g, and the reaction is terminated. . Cool the reaction mixture to 80°C, stop feeding N 2 Gas, and 199g of dimethyl sulfate continuously enter the mixing reactor, carry out continuous quaternization reaction, control 80 ℃ of reaction for 1.5 hours, measure the free amine content in the product to be 5mgKOH / g, can stop reaction.

Embodiment 2

[0023] Take by weighing 840g hydrogenated tallow acid and join in the four-necked bottle of 2000mL, under N 2 Stir under atmospheric conditions and heat up to 80°C. After all of them are melted, add 2g of phosphorous acid and 198g of methyldiethanolamine, stir and heat up to 180°C. After 7 hours of heat preservation, the acid value of the product is 2.5mgKOH / g. Abort the reaction. Cool the reaction mixture to 80°C, stop feeding N 2 Gas, and 199g dimethyl sulfate continuously enter the mixing reactor, carry out continuous quaternization reaction, control 80 ℃ reaction for 1.5 hours, measure the free amine content in the product to be 5mgKOH / g, can stop reaction.

Embodiment 3

[0025] Weigh 840g of tallow acid and add it to a 2000mL four-necked bottle, stir and heat up to 80°C under N2 atmosphere, after all of them are melted, add 2g of phosphorous acid and 248g of triethanolamine, stir and heat up to 200°C, keep warm for 6 After one hour, the acid value of the product was measured to be 2.5 mgKOH / g, and the reaction was terminated. Cool the reaction mixture to 80°C, stop feeding N 2 Gas, enters mixing reactor continuously together with 199g dimethyl sulfate, carries out continuous quaternization reaction, reacts 1.5 hours, records free amine content in the product and is 5mgKOH / g, can stop reaction.

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Abstract

The present invention is continuous solvent-free process of synthesizing ester-base quaternary ammonium salt, and features that at certain temperature, long chain tert amine carboxylate and alkylating agent as materials are mixed and reacted to produce ester-base quaternary ammonium salt in the structure as shown. The synthesis process of the present invention has continuous production, short reaction period, low power consumption, high conversion rate and high selectivity and the product with high active component content may be used as fabric softening agent, leather softening agent, disinfectant, etc.

Description

technical field [0001] The invention relates to a method for synthesizing an ester quaternary ammonium salt. Background technique [0002] The present invention relates to the method for synthesizing ester group quaternary ammonium salt. Ester-based quaternary ammonium salts are widely used in industry and are mainly used to make fabric softeners. At present, fabric softeners are mainly cationic surfactants. The softener first used in commercialization in 1950 was dihydrogenated tallow Dimethylammonium chloride (DHTDMAC), while developing DHTDMAC, has developed products including diamidoethoxylated quaternary ammonium salts, ester quaternary ammonium salts, imidazoline quaternary ammonium salts and other products using fatty acids as raw materials. However, these quaternary ammonium salt synthesis processes generally use methyl chloride, dimethyl sulfate, dipropyl sulfate or inorganic acids as alkylating agents, which must be produced intermittently in the presence of solve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C219/06C07C219/08C07C213/08D06M13/463
Inventor 张高勇卢中极王志军
Owner SOLVAY ZHANGJIAGANG SPECIALTY CHEM
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