磺化硅胶催化合成乙酸系列酯的研究  

The Study of Silica Sulfuric Acid (SSA) Catalytic Synthesis of Series Acetic Ester Compounds

作　　者：李冰[1] 马晶晶[1] 李婷[1] 陈小燕[1] 田晓燕[1] 刘万毅[1] 

机构地区：[1]宁夏大学化学化工学院,宁夏银川750021

出　　处：《广东化工》2013年第21期10-12,共3页Guangdong Chemical Industry

基　　金：宁夏大学自然科学基金重点项目(No:ZR1104)

摘　　要：磺化硅胶是一种以化学键键合而成,性能稳定的固体酸催化剂。文章以合成乙酸异戊酯为探针反应,考察磺化硅胶用量、原料配比、回流时间以及催化剂的重复使用次数对反应酯化率的影响,并将磺化硅胶用于催化合成乙酸系列酯。实验得到乙酸异戊酯的最佳合成条件为∶催化剂用量为反应物总质量的1.5%,n(乙酸)∶n(异戊醇)=1∶1.5,回流时间为60 min,反应的酯化率可达97.1%,催化剂重复使用8次后的酯化率仍达80.0%。根据参考文献的最佳条件合成了乙酸系列酯的结果表明:磺化硅胶对乙酸系列酯的合成具有良好的催化活性。Silica sulfuric acid （SSA） is a kind of solid acid catalyst with chemical bonding and stable performance. In this paper, we take synthetizing isoamyl acetate as probe reaction with SSA as catalyst. The influences of catalyst＇s dosage, the molar ratio of alcohol with acid, the reaction time and reused times for catalyst were investigated. The results indicate that the optimal reaction conditions are as follows： when the quality of the catalyst to total material is 1.5 %, the molar ratio of acetic to isoamyl alcohol is 1 ： 1.5 and reaction time is 60 rain, the esterification rate is up to 97.1%. What＇s more, when the catalyst was reused after 8 times, the esterification rate was still up to 80.0 %. According to the best condition of references, series acetate was synthesized with SSA as catalyst. The results showed that SSA has good catalytic activity for the synthesis of series acetate.

关 键 词：固体酸催化剂 磺化硅胶 催化 乙酸异戊酯 乙酸系列酯 

分 类 号：TQ[化学工程]