DEHYDROGENATION CATALYST FOR ALKYL SUBSTITUTED CYCLOHEXANE AND DEHYDROGENATION REACTION METHOD

摘要

PURPOSE:The dehydrogenation catalyst which can dehydrogenate the alkyl substituted cyclohexane producing H2 gas and the dehydrogenation product at high conversion ratio and high selectivity, being prepared by making a noble metal of the eighth family to carry on an aluminum sponge. CONSTITUTION:This dehydrogenation catalyst is prepared by making one weight part of the noble metal of the eighth family (Pt, Pd, for example) to carry on the alminium sponge by the ratio of 0.001-0.1 weight parts, especially 0.01-0.1 weight parts; this dehydrogenation catalyst is employed in the fixed bed type or the fluidized bed type reactor for the purpose of dehydrogenation reaction by contacting the catalyst with the alkyl substituted cyclohexane at 290-620 deg.C, especially at 300-600 deg.C, for the period longer than 0.1 seconds, especially longer than 0.5 seconds, for instance. Hereupon, if the H2 gas is permitted to the exist in the reaction system, the favorable amount of H2 gas to exist is more than 13.8mol per one mole of alkyl substituted cyclohexane. According to this reaction, toluene is obtained from methylcyclohexane, for example.