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AssigneeEngelhard Corporation
InventorsDavid H. Harris, Mingting Xu, David Stockwell, Rostam J. Madon
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A fluid catalytic cracking catalyst made from microspheres that initially contain kaolin, a dispersible boehmite alumina and a sodium silicate or silica sol binder. The kaolin portion contains hydrous kaolin and a particular kaolin which has been calcined through its characteristic exotherm and which produces a catalyst having a novel morphology comprising a macroporous matrix and crystallized zeolite freely coating the walls of the pores of the matrix. Calcination of the hydrous kaolin to metakaolin and formation of in-situ zeolite by treatment with sodium silicate yields a catalyst containing Y-faujasite and transforms the dispersible boehmite into a transitional alumina. The catalyst can be used to crack resid or resid-containing feeds as the alumina phase formed from the dispersible boehmite passivates nickel and vanadium contaminants.
A zeolitic fluid catalytic cracking catalyst which passivates nickel and vanadium during catalytic cracking comprising:
A fluid catalytic cracking catalyst comprising microspheres containing in-situ crystallized Y-faujasite, and having a mercury porosity of greater than about 0.15 cc/g for pores having diameters in the range of 40-20,000 Å, said microspheres comprising:
A macroporous, zeolite FCC catalyst which passivates metal contaminants comprising zeolite crystallized as a layer on the surface of a porous alumina-containing matrix, said zeolite-layered matrix arranged in a configuration to provide macropores in which the zeolite layer is provided on the walls of the macropores, said alumina-containing matrix comprising a calcined dispersible boehmite.
Dependencies are inferred from the claim text.