新型纳米SO_4^(2-)/TiO_2催化剂制备及催化合成醋酸丁酯  

Synthesis of butyl acetate catalyzed by novel nanosized SO_4^(2-)/TiO_2 catalyst

作　　者：章月 蒋平平 董玉明 顾同新 吴洁 郁盛健 

机构地区：[1]江南大学化学与材料工程学院,江苏无锡214122 [2]宜兴汉光高新石化有限公司,江苏无锡214122

出　　处：《工业催化》2012年第12期63-66,共4页Industrial Catalysis

基　　金：国家"十二五"科技支撑计划(2012BAD32B03)资助项目;宜兴科技支撑计划-工业科研经费(SBE201101247)资助项目

摘　　要：采用高压水热法合成纳米锐钛矿相TiO2前驱体,通过H2SO4溶液浸渍制备系列新型SO24-/TiO2催化剂,采用XRD、TG-DTG和TEM对其结构和形貌进行表征,并用于催化醋酸与正丁醇的酯化反应,考察H2SO4溶液浓度、浸渍时间和反应时间对酯化率的影响。结果表明,在H2SO4浓度1 mol·L-1、浸渍时间12h和反应时间180 min条件下,酯化率高达99.2%,催化剂具有优异的催化性能和较佳的重复使用性。Nanosized SO4^2/TiO2 catalysts were synthesized by impregnating aqueous HzSO4 on anatase TiO2,which was prepared by a novel hydrothermal procedure. The texture properties and morphology of SO4^2/TiO2 catalysts were characterized by XRD, TG-DTG and TEM. Their catalytic activity was evaluated in the esterification of acetic acid with n-butanol. The effects of H2SO4 solution concentration,impregna- ting time and reaction time on esterification rate were investigated. The results Showed that the esterifica-tion rate of 99.2% was obtained under the optimum condition as follows： H2SO4 solution concentration 1 mol · L^-1, impregnating time 12 h and reaction time 180 min. The obtained catalyst possessed excellent catalytic properties and reusability.

关 键 词：催化化学 固体酸 纳米SO24-/TiO2催化剂 酯化反应 醋酸丁酯 

分 类 号：O643.36[理学—物理化学] TQ426.94[理学—化学]