两步法合成混合脂肪酰胺丙基甜菜碱表面活性剂工艺研究
Technology for Two-Step Synthesis of Mixed Fatty Amidopropyl Betaine Surfactant
雷小英 1司福军 1洪玉倩 1裴壮壮 1曹一飞 1刘炜康 1李伏益 1洪郑1
作者信息
- 1. 赞宇科技集团股份有限公司,浙江杭州,310009
- 折叠
摘要
以混合脂肪酸(月桂酸、豆蔻酸和硬脂酸)、N,N-二甲基1,3-丙二胺、氯乙酸、液碱等为原料,两步法制备混合脂肪酰胺丙基甜菜碱.第一步酰胺化反应优化的工艺条件为:nDMAPA/n脂肪酸=1.20,反应温度控制在130～140℃,反应14 h,混合脂肪酸转化率达98.8%.第二步季胺化反应研究了游离胺随反应时间的变化,较优工艺条件为:n氯乙酸/nPKO=1.06,反应温度控制80～90℃,反应6 h,混合脂肪酰胺丙基甜菜碱中游离胺0.23%,游离脂肪酸0.24%.
Abstract
Mixed fatty amidopropyl betaine surfactant was prepared by a two-step method with Mixed fatty acids(lauric acid,myristic acid and stearic acid),N,n-dimethyl 1,3-propylenediamine,chloroacetic acid and liquid alkali as raw materials.The optimized process conditions for the first-step amidation reaction were as follows:the molar of DMAPA to atty acid:1.2:1,the reaction temperature was maintained at 130～140℃for 14 hours.The conversion rate of mixed fatty acids was 98.8%.The second step of quaternary amination reaction was to study the change of free amine with reaction time.The optimal process conditions were as follows:the molar of Chloroacetic acid to PKO:1.06:1,the reaction temperature was maintained at 80～90℃for 6 hours.The mixture of fatty amidopropyl betaine contains 0.23%free amine and 0.24%free fatty acid.
关键词
混合脂肪酰胺二甲基叔胺/混合脂肪酰胺丙基甜菜碱表面活性剂/表面活性Key words
mixed fatty amide dimethylamine/mixed fatty amidopropyl cocamidopropyl betaine/surface activity引用本文复制引用
出版年
2024
NETL
NSTL
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