固体负载酸Al_2O_3/SO_4～2-催化合成乙酸正丙酯

以固体负载酸Al2O3/SO42-为催化剂,由正丙醇与醋酸直接催化酯化合成乙酸正丙酯,考察了固体负载酸制备中酸的浓度、酯化原料醇与酸的量比、催化剂用量、反应时间等因素对酯化的影响,得到了适宜的条件为:催化剂制备使用硫酸浓度为2 mol/L,酯化反应时醇酸量比为1.3,固体负载酸Al2O3/SO42-的用量为1.5 g(相对0.2625 mol的乙酸量),反应时间为2 h。此时,酯化率为67%。

Synthesis of n-propyl acetate catalyzed by solid supported acid Al2O3/SO42-

n-Propyl acetate was prepared by esterification of acetic acid with n-propanol catalyzed by solid supported acid Al2O3/SO42-.The effects of the sulfuric acid concentration for catalyst preparation,,feed ratio of 1-propanol to acetic acid,catalyst amount and reaction time on the esterification were investigated.The results showed that the optimum conditions were the sulfuric acid concentration for catalyst preparation 2 mol·L-1,the feed molar ratio of n-propanol to acetic acid 1.3,catalyst loading 1.5 g(relative to 0.2625mol acetic acid) and reaction time 2.0 hours.Under these conditions,the esterification rate was 67%.