机械混合催化剂上苯选择加氢与环己烯水合反应集成

Integration of Selective Hydrogenation of Benzene and Hydration of Cyclohexene on Mechanical Mixed Catalyst

以机械混合的Ru-Zn+HZSM-5为催化剂,在釜式反应器中对苯选择加氢与环己烯水合反应集成进行了初步研究.发现引入HZSM-5后苯转化率大大增加,环己烯选择性下降,分析认为是氢溢流的原因;无机添加剂硫酸锌的存在使HZSM-5水合催化性能下降,从而导致目的产物环己醇收率低;通过表征分析认为是Zn2+存在于HZSM-5表面,使得具有水合催化活性的B酸中心减少造成的.提出了一种脉冲进氢的新型操作方式,对其关键因素进行了优化,在一定程度上提高了集成反应体系中环己烯和环己醇的收率.

The integration of partial hydrogenation of benzene and hydration of cyclohexene with mechanical mixed Ru-Zn＋HZSM-5 catalysts（produced by Asahi Chemical Industry Co.） was investigated in a batch reactor.The addition of HZSM-5 resulted in high conversion of benzene and low selectivity of cyclohexene.It was thought to be the result of the effect of hydrogen spillover.The addition of ZnSO4 resulted in decreasing of cyclohexene conversion and cyclohexanol yield.It was found that the existence of Zn2＋ on the surface of HZSM-5 resulted in decreasing of B acid.A dynamic operation by pulsed hydrogenation for the integration system was investigated.The reaction conditions of the integrated reaction were optimized and the yield of cyclohexene and cyclohexanol was increased.