摘要
研究了离子液体在柠檬酸植物甾烷醇酯合成中的应用。通过植物甾烷醇酯化率的对比,确定最佳反应条件为:离子液体[pmim][HSO4]用量为植物甾烷醇质量的7%,酸醇摩尔比3∶1,植物甾烷醇的浓度0.15 mmol/mL,带水剂为甲苯,反应温度110℃,反应时间5 h。在最佳条件下,经3次平行实验测得平均酯化率大于91%。离子液体[pmim][HSO4]在循环使用6次后仍有较高的催化活性。由质谱分析可知,合成的产物为柠檬酸植物甾烷醇酯。
The synthesis of citrate phytosterol esters in the presence of various ionic liquids was studied. The highest yield ( 〉 91% ) of citrate phytosterol esters was obtained under the optimal conditions: [ pmim] [ HSQ] dosage 7% (based on the phytostanol mass), molar ratio of citric acid to phytostanol 3: 1, phytostanol concentration 0. 15 mmol/mL, toluene as water - entrainer, reaction temperature 110 ~C, reaction time 5 h. [ pmim ] [ HSO4 ] had highly catalytic activity after six operation runs. The product was confirmed to be citrate phytosterol esters by mass spectroscopy.
出处
《中国油脂》
CAS
CSCD
北大核心
2013年第4期34-38,共5页
China Oils and Fats
基金
国家自然科学基金项目(31071600)
江苏省自然科学基金(BK2011155)
江苏省研究生创新工程(CXZZ11-0485)