摘要
以硬脂酸和无水乙醇为原料,固体超强酸TiO2/SO2-4为催化剂,催化合成硬脂酸乙酯,考察了不同活化温度对催化剂催化活性的影响,原料醇酸比、反应的时间、催化剂的用量等工艺条件对酯化反应产率的影响,并用正交实验优化出较佳的合成条件,即520°C活化的催化剂催化活性最高.较佳的工艺条件是:乙醇∶硬脂酸=9∶1,催化剂∶硬脂酸=0.09∶1,反应温度为83°C,反应时间为8h.硬脂酸乙酯产率可达96.5%.
This paper reports that a solid superacid TiO_2/SO^(2-)_4catalysis synthesized stearic ethyl ester for stearic acid and ethyl alcohol. It is researched that the influence for activation temperature to catalytic activity; the alcohol-acid rate,time,quantity of catalyzer have influence upon yield of esterication reaction.The experimental results show that the 520°C is the best activation temperature, the optimum technological condition are temperature 83°C,reaction time 8h,n(ethyl alcohol)∶n(stearic acid)=9∶1 and m(catalyst)∶m(stearic acid)=0.10∶1.Under these condition,yield of stearic acid ethyl ester can reach 96.5%.
出处
《泉州师范学院学报》
2004年第6期61-64,共4页
Journal of Quanzhou Normal University
基金
福建省教育厅科技基金资助项目(JA02249)
关键词
硬脂酸乙酯
固体超强酸
酯化反应
催化合成
stearic acid ethyl ester
soild super acid
esterification
catalysis synthetize
