PW_(12)/E-12催化剂的制备及对柠檬酸和正丁醇酯化反应的催化性能  

PREPARATION AND CATALYTIC PERFORMANCE OF PW_(12)/E-12 OVER ESTERIFICATION REACTION OF CITRIC ACID WITH N-BUTYL ALCOHOL

作　　者：黄媛媛[1] 郭剑桥 虞宁 丁嘉[1] 李工[1] 

机构地区：[1]常州大学石油化工学院,江苏常州213164 [2]溧阳市江南绝缘粉末厂,江苏常州213371

出　　处：《精细石油化工》2015年第4期6-10,共5页Speciality Petrochemicals

摘　　要：用环氧树脂E-12为载体,采用浸渍法负载磷钨酸制备了多相催化剂PW12/E-12,用于催化柠檬酸和正丁醇反应制备柠檬酸三丁酯,并用XRD、FT-IR、SEM及热重分析等方法对其进行了结构表征。结果表明:环氧树脂E-12对PW12具有较强的吸附力;PW12/E-12具有良好的催化活性,其中以负载量为15%的催化剂活性最高,稳定性最好。对于柠檬酸和正丁醇的酯化反应,在n(正丁醇)∶n(柠檬酸)=5∶1、120℃、反应时间4.5h、催化剂用量为4%条件下,柠檬酸的转化率和柠檬酸三丁酯的选择性分别为97.67%和95.81%,反应后的催化剂可以回收和重复使用。The heterogeneous catalysts PW12/E-12 were prepared by impregnation to immobilize phos- photungstic acids （PW12） on E-12, which were used in esterification reaction of citric acid with n-butyl alcohol and characterized by XRD, FT-IR, SEM and thermal analysis. The results showed that PW12/E-12 had highly catalytic activity, and E-12 had strong adsorbability to PW12, while PW12/E- 12 with the loading of 15% was the most stable catalyst and had the highest catalytic activity. In the esterification reaction of citric acid with n-butyl alcohol, the conversion of citric acid and the selectivity to TBC were 97.67% and 95.81%, respectively, under the reaction conditions that n（alcohol） ：n （acid） =5 ： 1, the catalyst dosage of 4%, temperature of 120℃ and reaction time of 4. 5 h. Reacted catalyst can be recycled and reused.

关 键 词：环氧树脂E-12 磷钨酸 负载 催化反应 柠檬酸三丁酯 

分 类 号：TQ414[化学工程]