Hydrocarbon cracking with mixture of zeolites Y and ZSM-5
AssigneeExxon Research & Engineering Co.
InventorsElroy M. Gladrow, William E. Winter
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Abstract
A hydrocarbon cracking catalyst comprises an ultrastable Y-type crystalline zeolite, a small pore crystalline ZSM-type zeolite, an inorganic oxide matrix and, optionally, a porous inert component. The cracking catalyst has a high activity and selectivity for the production of high octane naphtha fractions from higher boiling point hydrocarbonaceous oils. Catalytic cracking processes utilizing the catalyst are also provided.
Claims12
A catalytic cracking process which comprises contacting a hydrocarbonaceous feed at catalytic cracking conditions in the absence of added hydrogen with a catalyst comprising:
- (a) an ultrastable Y-type crystalline alumino-silicate zeolite having less than about 1 weight percent rare earth metals, calculated as the elemental metal, based on the zeolite;
- (b) a small pore crystalline ZSM-5 type zeolite;
- and
- (c) a catalytic inorganic oxide matrix.
Dependencies are inferred from the claim text.