Bi-capped Keggin型高钒杂多酸催化合成苯甲酸正丁酯  

Synthesis of n-Butyl Benzoate Catalyzed by Bi-capped Keggin Heteropolyacid with High Content of Vanadium

作　　者：麻明友[1] 何则强[1] 熊利芝[1] 黄可龙[2] 吴显明[1] 肖卓炳[1] 

机构地区：[1]吉首大学化学化工学院 [2]中南大学化学化工学院,长沙410083

出　　处：《食品与发酵工业》2006年第2期8-11,共4页Food and Fermentation Industries

基　　金：国家自然科学基金项目(No.29843002);湖南省教育厅优秀青年项目(No.04B016);中国博士后科学基金项目(No.2005037700);中南大学博士后科学基金项目(No.2004107)资助

摘　　要：以苯甲酸和正丁醇为原料,甲苯为带水剂,用自制的 Bi-capped Keggin 型高钒杂多酸 H_7PV_(12)Mo_2O_(42)为催化剂,合成了苯甲酸正丁酯。探讨了催化剂用量、原料配比、带水剂用量和反应时间对产品收率的影响。结果表明,合成该酯的最佳工艺条件为：n(正丁醇)/n(苯甲酸)=3,催化剂用量为反应物料总质量的10%,带水剂用量15 mL,反应温度控制在110～115℃,反应时间90 min。在最佳实验条件下,酯收率可达87．12%,表明 H_4PV_(12)Mo_2O_(42)是一种合成苯甲酸正丁酯的优良催化剂。Bi-capped Keggin heteropolyacid H7PV12Mo2O42 was synthesized and used as catalyst for the synthesis of n-butyl benzoate using benzoic acid and n-butyl alcohol as raw materials and toluene as a carrying water reagent. The effects of reaction conditions were investigated. The optimal conditions obtained for the reaction are as follows： mole ratio of alcohol to acid： 3, mass ratio of catalyst to reactant： 10% ,volume of water carrying agent： 15 mL,reaction temperature： 110-115℃ and reaction time 90 min. Under theses conditions,yield of n- butyl benzoate could to reach 87.12%, suggesting that H7PV12Mo2O42 is a good catalyst for the synthesis of n- butyl benzoate.

关 键 词：苯甲酸正丁酯 Bi—capped KEGGIN型杂多酸 酯化 催化剂 

分 类 号：TQ245.24[化学工程—有机化工]