以苯甲醇与正辛酸为原料合成了辛酸苄酯,咪唑类和吡啶类具有PS(丙烷磺酸基)功能基团的离子液体作催化剂,考察了其阴、阳离子对催化活性的影响。并选择[PSPy]HSO4为催化剂,研究了酸醇摩尔比、催化剂用量、反应温度和反应时间等对酯化率的影响,实验结果表明,催化剂用量为正辛醇的20%(摩尔分数),反应温度120℃,反应时间2.5h,酯化率达95.3%;此外,该催化剂重复使用10次后,酯化率达94.2%。 Benzyl alcohol, benzyl alcohol and n-octanoic acid were used as raw materials to prepare the ionic liquid with PS (propane sulfonate) functional group as the catalyst. The effects of anion and cation on the catalytic activity were studied. The effects of molar ratio of acid to alcohol, amount of catalyst, reaction temperature and reaction time on the esterification rate were investigated by selecting [PSPy] HSO4 as a catalyst. The experimental results showed that the catalyst dosage was 20% (mole fraction) of n-octanol, The reaction temperature was 120 ℃, the reaction time was 2.5h and the esterification rate was 95.3%. In addition, the esterification rate reached 94.2% after the catalyst was reused 10 times.