磺化硅胶催化合成乙酸正丙酯的研究

摘要

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%, the esterification rate was up to 93.4%.the catalyst was reused after 10 timeed , the esterification rate was still up to 81.8%.SSA showed good catalytic activity for the synthesis of normal propyl acetate.%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。