To reduce the raw material costs of aniline pesticide intermediates and consume the large amounts of by-product cyclohexane from the adipic acid industry,a platinum-based alumina catalyst was prepared using the impregnation method.This catalyst was used for the catalytic dehydrogenation of cyclohexane.The effects of reaction temperature,reaction time,weight hourly space velocity,and platinum content in the catalyst on the conversion rate and selectivity for the production of benzene and hydrogen were investigated.The optimized conditions were determined to be a temperature of 290 ℃,a weight hourly space velocity of 1.5 h-1,a reaction pressure of 30 KPa,a platinum content of 0.50％,and a reaction time of 30 minutes.Under these optimized conditions,the conversion rate and selectivity for the catalytic dehydrogenation of cyclohexane to produce benzene and hydrogen reached as high as 97.0％and 99.5％,respectively.This provides a new direction for the effective utilization of cyclohexane.
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