| 摘要 |
PURPOSE:To obtain cyclohexene useful as an intermediate for caprolactam, etc. and a pollution-free solvent, etc., economically on an industrial scale, by dehydrating cyclohexanol in the presence of niobic acid as a catalyst. CONSTITUTION:Cyclohexene useful as an intermediate for adipic acid, lysine, various other pharmaceuticals, dyes, etc., can be produced in high yield, by the catalytic reaction of cyclohexanol in the presence of niobic acid as a catalyst, usually at 150-400 deg.C, preferably at 200-350 deg.C. The above catalyst has high activity and selectivity to the dehydration reaction of cyclohexanol, and has long catalytic life, and accordingly, cyclohexene can be produced from cyclohexanol economically by this process. |
