Patent ID: 7884257

Claim:
A method for producing ethylene and propylene by contacting a hydrocarbon material that contains at least one olefin having from 4 to 12 carbon atoms in an amount of at least 20% by weight, with a zeolite-containing shaped catalyst in a reactor for catalytic conversion of the at least one olefin having from 4 to 12 carbon atoms, wherein zeolite in the zeolite-containing shaped catalyst satisfies the following requirements (1), (2), (3) and (4): (1) the zeolite is an intermediate pore-size zeolite having a pore size of from 5 to 6.5 angstroms, (2) the zeolite does not substantially contain a proton, (3) the zeolite contains at least one metal selected from the group consisting of metals belonging to the Group IB of the Periodic Table, (4) the zeolite has a silica/alumina molar ratio (SiO 2 /Al 2 O 3 molar ratio) of from 800 to 2,000.