HZSM-5催化乙酸环己酯水解反应

考察了不同反应条件下加入酸性离子液体［HSO₃bmim］HSO₄前后HZSM-5催化乙酸环己酯水解制备环己醇反应。结果表明，未加入［HSO₃bmim］HSO₄时，因乙酸环己酯热分解而生成的副产物环己烯选择性可达73.0%；加入［HSO₃bmim］HSO₄后，目的产物环己醇选择性增加，在适宜条件下，乙酸环己酯转化率为81.6%，环己醇选择性为79.7%。［HSO₃bmim］HSO₄的加入抑制了HZSM-5表面积炭的生成，提高了催化剂的重复使用性能。

Hydrolyzation of Cyclohexyl Acetate Over HZSM-5 Catalyst

Hydrolyzation of cyclohexyl acetate to cyclohexanol over HZSM-5 catalyst was studied under different conditions before and after adding acidic ionic liquid ［HSO₃bmim］HSO₄. It was found that cyclohexene, which came from the pyrolysis of cyclohexyl acetate, was the main side-product and the selectivity to cyclohexene was up to 73.0% in cyclohexyl acetate hydrolyzation over HZSM-5 catalyst without adding［HSO₃bmim］HSO₄.The addition of ［HSO₃bmim］HSO₄ to the reaction could increase the selectivity to the target product cyclohexanol. Under the optimized conditions, cyclohexyl acetate conversion was 81.6% with 79.7% cyclohexanol selectivity. Moreover, the addition of ［HSO₃bmim］HSO₄ restricted the formation of deposited coke on HZSM-5 and then increased its stability for repeated use.