Patent ID: 7326332
Filing Date: 2008-02-05
Classification: B01J,C10G

Abstract:
1. A catalytic cracking process for selectively producing C 3 olefins, said process comprising contacting under catalytic cracking conditions, a feedstock containing hydrocarbons having at least 5 carbon atoms with a catalytic cracking catalyst comprising catalytically effective amounts of a multicomponent catalyst comprising: (a) a first molecular sieve component having an intermediate pore size; and (b) a second molecular sieve component having a structure type that is different from said first molecular sieve and a pore size index of at least one channel of said second molecular sieve which is less than the pore size index of at least one channel of said first molecular sieve; and wherein said multicomponent catalyst provides recovering a higher propylene conversion, by weight percent, than with either said first component or said second component alone.