摘要
在无溶剂体系下,采用离子液体———1-甲基-3-磺丙基咪唑硫酸氢盐[Spmim][HSO4]催化甘油和中碳链脂肪酸(辛酸和癸酸混合物)酯化合成中碳链甘三酯。在单因素实验基础上,采用响应面设计对反应条件进行优化,得到最佳反应条件为:反应温度160℃,反应时间14.03 h,催化剂加入量(以脂肪酸和甘油的总质量计)0.74%,底物摩尔比(脂肪酸与甘油摩尔比)3.2∶1。在最佳工艺条件下,中碳链甘三酯的得率为92.90%,酯化率为95.48%,产物中甘二酯、甘一酯和游离脂肪酸含量分别为2.38%、0.21%和4.51%。
The medium chain triglycerides （MCT） were synthesized from esterification of medium fatty acids （mixture of caprylic acid and capric acid） and glycerol catalyzed by ionic liquid--1 -methyl - 3 -sulfopropyl benzimidazole hydrogen sulfate [ Spmim] [ HSO4 ] in solvent -free system. The optimal synthesis conditions of MCT were obtained by response surface methodology based on single factor ex- periment as follows： reaction temperature 160℃, reaction time 14.03 h, catalyst dosage （based on the total mass of fatty acid and glycerol ） 0.74% and substrate molar ratio （ ratio of fatty acid to glycer- ol ） 3.2： 1. Under the optimal conditions, the MCT yield was 92.90%, esterification rate was 95.48% and the contents of diglycerides, monoglycerides and free fatty acids in the product were 2.38% , 0.21% and 4.51% ,respectively.
出处
《中国油脂》
CAS
CSCD
北大核心
2013年第5期51-55,共5页
China Oils and Fats
关键词
离子液体
中碳链甘三酯
酯化
响应面
ionic liquid
medium chain triglycerides
esterification
response surface methodology
