H_3PW_(12)O_(40)/TiO_2催化合成醋酸异戊酯  

Synthesis of Iso-amyl Acetate Catalyzed by H_3PW_(12)O_(40)/TiO_2

作　　者：张世金[1] 程磊[1] 许招会[1] 廖维林[1] 

机构地区：[1]江西师范大学化学化工学院,江西南昌330027

出　　处：《江西化工》2006年第3期54-56,共3页Jiangxi Chemical Industry

基　　金：江西师范大学青年成长基金资助项目(编号:1341)

摘　　要：采用溶胶—液相法制备了H3PW12O40/TiO2复合催化剂,用FT—IR分析方法对催化剂进行了结构表征。以醋酸和异戊醇为原料合成了醋酸异戊酯,考察了反应物配比、催化剂用量、反应时间及催化剂的重复使用性能对产品收率的影响。实验结果表明:合成醋酸异戊酯的较优反应条件为:异戊醇0.1mol,n(醋酸)/n(异戊醇)=1.4/1.0(mol/mol),催化剂的用量为1.25g,环己烷为带水剂,反应时间3.0h。上述条件下,醋酸异戊酯的收率可达87.0%以上。A complex catalyst, H3PW12O40/TiO2 was prepared by sol - gol method and identified by FT- IR. Iso- amyl acetate was synthesized from acetic acid and iso- amyl alcohol using it as the catalyst. The factors influencing the synthesis were discussed and the better conditions are as follows：iso- amyl alcoho10, l mol, n （iso- amyl alcohol）/n（ acetic acid） = 1.0/1.4（ tool/tool）, the amount of catalyst is 1.25g, the amount of cyclohexane as water- carrying agent is 12mL, the reaction time is 3. Oh. Experimental results showed that under the above reaction conditions the yield of iso- amyl acetate can reach over 87.0 %.

关 键 词：磷钨酸 钛酸四丁酯 醋酸异戊酯 合成 

分 类 号：O643.32[理学—物理化学] O623.624[理学—化学]