Synthesis of cyclohexene by solid super acid catalyst SO_4~(2-)/ZrO_2 and S_2O_8~(2-)/ZrO_2

Cyclohexene was prepared by applying a novel solid acid catalyst SO2-4/ZrO2 and S2O2-8/ZrO2 as dehydration catalyst.The effect of catalyst amount,temperature and reaction time on the dehydration reacation had been investigated.The results showed that SO2-4/ZrO2 and S2O2-8/ZrO2 possessed many advantages such as shorter reaction time,higher yield,smaller catalyst amount,being disposable and reusable.The optimal conditions for the reaction were as follows: catalyst was equal to 6% by the mass of the total reaction stock,reaction temperature 150 ℃,reaction time 0.9 h.