磺化硅胶催化合成乙酸正丙酯的研究  

Preparation of Normal Propyl Acetate with Silica Sulfuric Acid as Catalyst

作　　者：任建林[1] 

机构地区：[1]宁夏大学化学化工学院,宁夏银川750021

出　　处：《广州化工》2014年第19期34-36,共3页GuangZhou Chemical Industry

基　　金：宁夏高等学校科学研究项目(NGY2013008)

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。实验以磺化硅胶为催化剂,乙酸和正丙醇为原料合成了乙酸正丙酯。以单因素法分别考察了酸醇摩尔比、反应时间、催化剂用量以及催化剂的重复使用次数对酯化率的影响。最佳合成条件为:n(乙酸)∶n(正丙醇)=1∶1,回流时间为60 min,催化剂用量为反应物总质量的1.2%,反应的酯化率可达93.4%,催化剂重复使用10次后的酯化率仍达81.1%。研究结果表明:磺化硅胶对乙酸正丙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. Normal propyl acetate was synthesized from n -propyl alcohol and glacial acetic acid with SSA as catalyst. The optimal reaction conditions were as follows： when the molar ratio of acetic to propyl alcohol was 1 ： 1, and the reaction time was 60 min, the quality of the catalyst to total material was 1.2%, reused after 10 timeed, the esterification rate was still up to 81 of normal propyl acetate. the esterification rate was up to 93.4%. the catalyst was 8%. SSA showed good catalytic activity for the synthesis

关 键 词：固体酸催化剂 磺化硅胶 催化 乙酸正丙酯 

分 类 号：O63[理学—高分子化学]