硅胶固载氧化镓非均相催化合成乙酸丁酯  

Synthesis of butyl acetate with gallium oxide supported on silicagel as heterogeneous esterification catalyst

作　　者：杨更须[1] 曹永军[2] 史利勇[1] 陈丹云[1] 

机构地区：[1]河南大学化学化工学院精细化学与工程研究所,河南开封475004 [2]驻马店职业技术学院公共基础教学部,河南驻马店463000

出　　处：《应用化工》2011年第5期822-825,共4页Applied Chemical Industry

基　　金：河南省科技厅科技发展计划项目(092102210171)

摘　　要：在氧化镓固载量为20%,500℃焙烧2 h的条件下制备了硅胶固载氧化物型非均相酯化催化剂Ga2O3/S iO2,用于催化合成乙酸丁酯,考察了催化剂用量、n(正丁醇)∶n(乙酸)、环己烷用量、反应时间、带水剂用量和催化剂重复使用性等因素对酯化率的影响。结果表明,该催化剂催化合成乙酸丁酯的适宜反应条件为:乙酸0.2 mol,n(正丁醇)∶n(乙酸)=1.8,催化剂1.25 g,回流反应1 h,酯化率达99.62%。A novel heterogeneous esterification catalyst,gallium oxide supported on silica gel was prepared for the first time,which was obtained through loading concentration of Ga2O3 20%,calcinating at 500 ℃ for 2 h.The effects of various parameters such as catalyst dosage,molar ratio of n-butanol to acetic acid,amount of cyclohexane,reaction time and reusability of catalyst on esterification rate were investigated.The results indicated that the optimized conditions of synthesizing butyl acetate were：acetic acid 0.2 mol,molar ratio of n-butanol to acetic acid 1.8,dosage of catalyst 1.25 g,reaction time 1 h.The catalytic performance could exhibit high activity with the esterification rate over 99.62%.

关 键 词：硅胶固载氧化镓 乙酸丁酯 非均相催化 合成 

分 类 号：TQ225.24[化学工程—有机化工]