摘要
以Ti(OC4H9)4为原料,采用溶胶-凝胶法制备固体超强酸SO42-/WO3-TiO2,以SO42-/WO3-TiO2为催化剂,通过丁酸与异戊醇反应合成丁酸异戊酯。讨论了影响酯化率的主要因素,实验结果表明,当WO3在催化剂中的质量分数为3.0%,催化剂用量为0.6 g,醇酸摩尔比为1.5∶1,反应温度为125℃,反应时间为4.0 h时,平行实验的平均酯化率可达95.1%。该工艺具有催化剂价廉易得,催化效果好,用量少,操作简单,三废少,收率高等优点。
Isoamyl butyrate was prepared with butyric acid and isoamyl alcohol as raw materials by sol-gel process in which solid super-acid SO4^2 -/WO3-TiO2 made from Ti（ OC4H9 ）4 was used as catalyst. The primary factors affecting esterification efficiency of n-butyric acid were investigated. The results show that the average esterification efficiency of parallel experiment can reach 95.1% by using SO4^2 -/WO3-TiO2 as catalyst when the mass of SO4^2- / WO3-TiO2 is 6 g, w （ WO3 ） is 3.0%, molar ratio of isoamyl alcohol to butyric acid is 1.5 ： 1, reaction time is 4.0 h and reaction temperature is 125 ℃. The process has such advantages as cheap and easily available catalyst, good catalytic results, less amount, easy separation, simple operation, less three wastes and high yield, etc.
出处
《化学工程》
CAS
CSCD
北大核心
2006年第10期71-74,共4页
Chemical Engineering(China)
基金
安徽省自然科学基金资助项目(050450301)
安徽省教育厅自然科学基金资助项目(2005KJ136)
关键词
固体超强酸
丁酸
异戊醇
丁酸异戊酯
solid super-acid
butyric acid
isoamyl alcohol
isoamyl butyrate
