Octane and total yield improvement in catalytic cracking
AssigneeMobil Oil Corporation
InventorsArthur W. Chester, William E. Cormier, Jr., William A. Stover
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Abstract
Octane and total yield improvement in catalytic cracking processes can be attained by the addition to conventional cracking catalysts of very small amounts of additive catalyst comprising a class of zeolites characterized by a silica to alumina mole ratio greater than about 12 and a constraint index of about 1 to 12. The additive catalyst is added to the conventional cracking catalyst in the cracking process in an amount which provides the zeolite component of the additive catalyst at from about 0.01 weight percent to about 1.0 weight percent of the conventional cracking catalyst in the cracking process.
Claims16
In a process for catalytic cracking of petroleum fractions in the presence of a conventional cracking catalyst comprising at least about 5 weight percent of a catalytically active component and under cracking conditions, the improvement wherein separate additive catalyst comprising a zeolite characterized by a Constraint Index of from about 1 to about 12 and a silica to alumina mole ratio greater than about 12 is added to said conventional cracking catalyst in the cracking process in an amount which provides the zeolite component of said separate additive catalyst at from about 0.01 weight percent to about 1.0 weight percent of the conventional cracking catalyst in the cracking process.
Dependencies are inferred from the claim text.