Patent ID: 6307117
Filing Date: 2001-10-23
Classification: B01J,C07C,C10G,Y02P

Abstract:
A method for producing ethylene and propylene from a hydrocarbon feedstock by catalytic conversion, which comprises:contacting, in a reactor, a hydrocarbon feedstock comprising 20% by weight or more, based on the weight of said hydrocarbon feedstock, of at least one C.sub.4 -C.sub.12 olefin with a zeolite-containing catalyst to thereby effect a catalytic conversion reaction of said at least one C.sub.4 -C.sub.12 olefin, thereby obtaining a reaction mixture containing ethylene and propylene,wherein the zeolite in said zeolite-containing catalyst satisfies the following requirements (1), (2), (3) and (4):(1) said zeolite is an intermediate pore size zeolite having a pore size of from 5 to 6.5 .ANG.,(2) said zeolite contains substantially no proton,(3) said zeolite contains at least one metal selected from the group consisting of metals belonging to Group IB of the Periodic Table, and(4) said zeolite has an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of from 200 to 5,000; andseparating the ethylene and propylene from said reaction mixture.