中文摘要：

考察了无机盐（NaBr、ZnSO_4、NaHSO_4）对HZSM-5催化乙酸环己酯水解制备环己醇反应的影响。结果表明,无机盐可以增加反应体系的极性,抑制乙酸环己酯热分解副反应（β-消除反应）过渡态的生成,从而提高环己醇的选择性。同时,无机盐会破坏HZSM-5表面B酸中心,降低其催化活性。单独使用NaHSO_4对乙酸环己酯水解反应也具有较好的催化性能,在适宜条件下,乙酸环己酯转化率达到63.8%,环己醇选择性达到90.9%;重复使用时,由于乙酸在反应体系中的积累,乙酸环己酯转化率有所降低,环己醇选择性基本不变。

英文摘要：

Effect of inorganic salts（such as NaBr,ZnSO_4 and NaHSO_4）on catalytic hydrolyzation of cyclohexyl acetate to cyclohexanol over HZSM-5catalyst was studied.It is found that the inorganic salts could prohibit the formation of the transition state for the side reaction（pyrolysis of cyclohexyl acetate to cyclohexene,aβ-elimination reaction）by increasing the polarity of the reaction system,and thus high cyclohexanol selectivity was obtained.At the same time,inorganic salts destroyed the acid sites of Brnsted type on the surface of HZSM-5,resulting in the decrease of its catalytic activity.NaHSO_4 also showed good catalytic performance when it was employed as catalyst alone in this reaction,with cyclohexyl acetate of 63.8% and cyclohexanol selectivity of 90.9%under the certain conditions.When NaHSO_4 was recycle used,cyclohexanol selectivity changed little,while cyclohexyl acetate conversion decreased with recycle times increasing,which could be attributed to the accumulation of acetic acid in the reaction system.