THE PREPARATION OF CYCLOHEXENE BY DEHYDRATION OF CYCLOHEXANOL ON TI~(4+) MODIFICATORY CATION EXCHANGE RESIN CATALYST

In this work, the preparation of cyclohexene by dehydration of cyclohexanol on cation exchange resin modified with Ti4+ was studied. FT IR spectra of pyridine absorbed on the surface showed that the catalyst had Br?nsted acid and Lewis acid sites. They were indicated that catalyst showed high catalytic activity and the improvement of thermostability in preparation of cyclohexene by dehydration of cyclohexanol. The effect of Ti4+ exchange amount on the catalytic activity was investigated. The optimum conditions were as follows: cyclohexanol 40g, catalyst 5g, reaction temperature 175℃ and reaction time 60 min. The yield of cyclohexene was 89%.