Synthesis of 75% or more mass fraction of the laurel amide

Lauryl amide propyl betaine is one kind of new amphoteric surface active agent, it and cocamidopropyl betaine belong to a series are alkyl betaine modified derivatives. But lauric amide propyl betaine appeared in recent years with the similar products, compared to the better stability, excellent performance characteristics, the market demand continues to expand. The research literature is not common, domestic production of lauroylamidopropyl betaine is not much.

Currently market lauric amide propyl betaine content of active substances is about 30%, has yet to see a much higher content of product sales. Related articles published in China is relatively small, more representative is Fang Yiwen et al. < lauric amide propyl betaine synthesis and Properties >, but this article research is still 30% content of betaine solution, high content of product research in China is still relatively small.

Study on the high content of betaine in foreign countries more active, because of high content of betaine is relatively more can reduce the production, transportation, storage and use of cost, application is more safe and convenient and sanitary, use is more extensive, and other surface active agent combination is better.

This reference of similar products at home and abroad, with an organic solvent as reaction solvent system by mass fraction of active substances reached more than 75% of lauric amide propyl betaine. The method from lauric acid and N, N-dimethyl propylene diamine as raw materials in 160℃ to reflux temperature reaction of N, N - dimethyl - n '- lauroyl alanine, and sodium chloroacetate in organic solvents such as ethanol in at 70℃ to reflux temperature reaction and distillation of ethanol product. Products by liquid chromatography 198.1nm activity detection material content of up to 78%.