Process for the catalytic cracking of metals-containing feedstoc

Details Process for the catalytic cracking of metals-containing feedstoc Process for the catalytic cracking of metals-containing feedstoc

1985-01-03

1986-05-13

Doll, John

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

502 67, 502 79, C10G 1105

Patent

active

045884960

ABSTRACT:
Hydrocarbon feedstocks containing relatively high levels of metal contaminants, such as nickel and vanadium, are converted via catalytic cracking into products of lower average molecular weight by contacting the feedstock with a catalyst comprising a (1) porous, inorganic refractory oxide component and (2) a dealuminated Y zeolite having a silica-to-alumina mole ratio above about 6.0. The dealuminated Y zeolite is preferably prepared by contacting an ammonium-exchanged Y zeolite having a silica-to-alumina mole ratio below about 6.0 with an aqueous solution of ammonium hexafluorosilicate. The refractory oxide component will preferably contain alumina and a clay such as kaolin. The catalyst may also contain a nondealuminated Y zeolite, preferably one that has been ion exchanged with rare earth cations. Typically, the hydrocarbon feedstock will contain contaminant metals in sufficient quantities such that their concentration exceeds about 4.0 ppmw Nickel Equivalents.

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