摘要
以高酸值鱼油脂肪酸甘油酯为原料,采用两步法制备鱼油脂肪酸乙酯。先以浓硫酸做催化剂,与乙醇进行预酯化反应;再以KOH做催化剂,进行酯交换反应。通过正交实验得到最优反应条件如下:预酯化反应:反应温度70℃,浓硫酸浓度1.5%,反应时间1h;酯交换反应:反应温度70℃,KOH浓度0.5%,反应时间0.5h。最优实验条件下,乙酯得率为92.5%。
Fish oil ethyl esters were prepared by a two-step process using fish oil fatty acid glyceride with high acid value.The first step was sulfuric acid-catalyzed esterification, followed by KOH-catalyzed transesterification.The appropriate process conditions were obtained as follows by the orthogonal test： for esterification, the reaction temperature was 70R,the concentration of sulfuric was1.5%, the reaction time was 1h.For transesterification, the reaction temperature was 70℃, the concentration of KQH was 0.5%, the reaction time was 0.5h.Under the best conditions,the yield of ethyl ester is 92.5%.
出处
《食品工业科技》
CAS
CSCD
北大核心
2013年第5期275-277,共3页
Science and Technology of Food Industry
关键词
高酸值鱼油
鱼油乙酯
预酯化
酯交换
high acid value fish oil
fish oil ethyl esters
pre-esterification
transesterification
