摘要
该文探索在乙二醇溶剂中以氢氧化钠碱法异构化亚油酸甲酯制备共轭亚油酸的方法,适宜的异构化条件为m(氢氧化钠)∶m(亚油酸甲酯)∶m(乙二醇)=1∶5∶8.4,170℃反应4 h,亚油酸甲酯转化率和共轭亚油酸产率分别为92.4%和89.3%。该法比目前常用的亚油酸原料法的优越之处体现在:以氢氧化钠取代常用碱氢氧化钾,降低成本;以亚油酸甲酯取代亚油酸为原料,避免了原料本身大量消耗碱;反应初期避免原料大量皂化,减小了体系的传质阻力,因而减少了溶剂乙二醇消耗量。
Alkali isomerization of methyl linoleate by sodium hydroxide in ethy!ene glycol to prepare conjugated linoleic acid was explored. A conversion of methyl linoleate of 92. 4% and a yield of conjugated linoleic acid of 89. 3% were obtained under the optimum reaction conditions of m （sodium hydroxide） ：m（ methyl linoleate） ：m（ ethylene glycol） --- 1：5：8.4 at 170 ℃ for 4 h. The advantages to the new alkali isomerization of methyl linoleate instead of linoleic acid are the low-cost for commonly used potassium hydroxide being replaced by sodium hydroxide, the low consumption of alkali as methyl linoleate instead of the facilely saponified linoleic acid, and the diminished consumption of ethylene glycol since the mass transfer is easier because of the less initial saponification.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2014年第5期612-616,共5页
Fine Chemicals
基金
国家自然科学基金(21276113)~~
关键词
共轭亚油酸
碱法异构化
亚油酸甲酯
食品与饲料用化学品
conjugated linoleic acid
alkali isomerization
methyl linoleate
food and feedstuff chemicals
