CATALYTIC ACTIVATION DEHYDROALKYLATION BENZENE PROPANE TO SYSTEMS PT, REOX/ AL2O3 + H-ZEOLITE

The involvement of C1-C3 alkanes in the processes of obtaining valuable products is of great theoretical and practical importance. One of the ways to solve this problem is the possibility of catalytic involvement of these alkanes in the alkylation of aromatic compounds.( Y, M, ZSM-5) for the conversion of C6H6:C3H8 mixtures. The study was carried out on a mechanical mixture of an aluminum-platinum-rhenium catalyst prepared according to a well-known method and H-forms of zeolites (Y, M, ZSM-5). Formation of products conversion of benzene-propane mixtures MMC (mechanical mixture of catalysts) is accompanied by the occurrence of three reactions: a) the alkylation of benzene; b) the propane dehydrogenation; c) the formation of alkylaromatic hydrocarbons . The course of these reactions depends on the contact conditions of the studied mixtures with MMC. The interaction of propane with benzene proceeds most effectively on a mechanical mixture of catalysts, the components of which are unreduced MReOx/Al2O3 and the H-form of the zeolite, which are carriers of spatially separated redox and acid-base centers. The addition of small amounts of benzene to propane leads to the activation of propane and the formation of hydrogen, the yield of which corresponds to the molar conversion of propane. Depending on the temperature, the distribution of the conversion products of the C6H6 : C3H8 mixture is characterized by a change in the yields of IPB, n-PB, the sum of other aromatic C7-C9 hydrocarbons, and propylene.