酸性离子液体催化合成三醋酸甘油酯  

Synthesis of glycerol triacetate catalyzed by acidic ionic liquid

作　　者：李红娟[1] 于世涛[1] 刘福胜[1] 李红亮[1] 解从霞[2] 

机构地区：[1]青岛科技大学化工学院,山东青岛266042 [2]青岛科技大学化学与分子工程学院,山东青岛266042

出　　处：《工业催化》2007年第9期38-42,共5页Industrial Catalysis

基　　金：国家自然科学基金资助项目(30571463);山东省自然科学基金资助项目(Y2005B07)

摘　　要：合成了[HSO3-pmim]Cl、[HSO3-pmim][H2PO4]、[HSO3-pmim][BF4]和[HSO3-pmim][HSO4]离子液体,用^1H-NMR和FT-IR对离子液体的结构进行了确定。将几种酸功能化离子液体应用于三醋酸甘油酯的合成反应中,筛选出了一种催化效果好又可以重复使用的离子液体[HSO3-pmim][HSO4]。考察了催化剂用量、原料配比和反应时间对反应的影响,得到了较佳反应条件：n（甘油）∶n（醋酸）=1∶8,催化剂用量为醇酸总质量的5.8%,反应时间6 h,反应温度（80-90）℃。对该功能化离子液体的重复使用性进行了考察,重复使用10次后,三醋酸甘油酯的收率仍大于90%。[HSO3-pmim]Cl、[HSO3-pmim][H2PO4]、[HSO3-pmim][BF4]and [HSO3-pmim][HSO4] ionic liquids were synthesized and their structures were characterized by ^1 H-NMR and FT-IR. Glycerol triaeetate was synthesized using several acidic functional ionic liquids as the catalysts. [ HSO3-pmim] [ HSO4 ] had better catalytic results and could be repeatedly used. The influence of catalyst dosage, feed proportion and reaction time was investigated. The optimum condition was obtained as follows： n（glycerol） ： n（ acetic acid） = 1： 8, catalyst dosage 5.8% of the total weight of glycerol and acetic acid, reaction time 6 h, reaction temperature （80 - 90） ℃. Repeated use of the ionic liquid was investigated. Glycerol triacetate yield remained at over 90% after repeatedly use for 10 times.

关 键 词：三醋酸甘油酯 离子液体催化剂 酯化 

分 类 号：TQ426.92[化学工程] TQ225.242