PROCESS FOR PRODUCTION OF ETHYLENE AND PROPYLENE

摘要

The invention aims at providing a catalyst for the production of ethylene and propylene from raw hydrocarbon by catalytic conversion which attains high yield and high selectivity and is excellent in the resistances to deterioration by coking and deterioration by regeneration. The invention relates to a process for the production of ethylene and propylene which comprises bringing raw hydrocarbon containing 20% or more by mass of at least one olefin of 4 to 12 carbon atoms into contact with a zeolite-containing molded catalyst satisfying the following requirements (1) to (6) in a reactor to conduct catalytic conversion of the olefins: (1) the zeolite is an intermediate-pore-diameter one having pore diameters of 5 to 6.5Å, (2) the zeolite is substantially free from protons, (3) the zeolite contains at least one metal selected from the group consisting of Group IB metals of the periodic table, (4) the zeolite-containing molded catalyst is one made by using silica as the binder, (5) the zeolite-containing molded catalyst has a crushing strength of 2.5N/mm or above, and (6) the zeolite-containing molded catalyst in H-form has a sodium content of 500ppm or below.