固体酸催化合成棕榈酸乙酯  

Synthesis of Ethyl Palmitate with Solid Acid as Catalyst

作　　者：张艳[1] 章亚东[1] 蒋登高[1] 王朝进[1] 高晓蕾[1] 

机构地区：[1]郑州大学化工学院,河南郑州450002

出　　处：《精细化工》2003年第4期230-233,共4页Fine Chemicals

基　　金：河南省自然科学基金项目资助(994032800)

摘　　要：制备了TiO2/SO2-4、ZrO2/SO2-4、大孔磺酸树脂负载AlCl3等固体酸催化剂,考察了催化剂种类(包括所制备的固体酸和磷钨酸、硅钨酸等杂多酸)、用量、反应时间、物料摩尔比等对酯化反应的影响。选TiO2/SO2-4做催化剂,并采用正交实验技术,优化出较佳合成工艺条件,即:反应温度80℃,反应时间12h,n(棕榈酸)∶n(乙醇)=1∶9,m(催化剂)∶m(棕榈酸)=0 08∶1。棕榈酸乙酯的收率可达96 19%。Solid super acid such as TiO2/SO2-4,ZrO2/SO2-4 and AlCl3 loaded on macroporous sulfonic acid ionexchange resin were prepared.Effects of many factors,such as varieties of catalyst(including the solid acids prepared,H7·xH2O and H8·xH2O),amounts of catalyst,reaction time and mole ratio of reactants on esterification process were studied. Using TiO2/SO2-4 as catalyst,the optimum technological conditions were temperature 80 ℃,reaction time 12 h,n(palmitic acid)∶n(ethanol)=1∶9 and m(catalyst)∶m(palmitic acid)=008∶1.Under these conditions,yield of ethyl palmitate can reach 9619%.

关 键 词：棕榈酸乙酯 固体超强酸 酯化反应 催化合成 

分 类 号：TQ225.241[化学工程—有机化工]