Preparation of Cyclohexene via Catalytic Dehydration of Cyclohexanol

The dehydration of cyclohexanol to cyclohexene using stannous chloride as catalyst was studied. The optimum conditions for the reaction are the mass ratio of ctalyst to cyclohexanol, 20%; the reaction temperature, 170～(180°C); and the reaction time, 50 minutes. The conversion reaches more than 85.3%, and the product purity is 97.3%. The catalyst can be reused, and the reaction does not cause pollution.