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US 4,363,720 AGranted
Passivating metals on cracking catalysts with zinc
AssigneeStandard Oil Company (Indiana)
InventorsEugene H. Hirschberg, Ralph J. Bertolacini, Frank S. Modica
Life of this patent
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Abstract
A hydrocarbon cracking catalyst is treated with zinc to passivate contaminant metals, e.g., nickel, copper, vanadium, and iron, which are deposited on the catalyst during the catalytic cracking of hydrocarbon feedstocks.
Claims9
A passivation process which comprises contacting, under cracking conditions:
- (a) a hydrocarbon feedstock containing a level of contaminant metals at least about 1.0 ppm Nickel Equivalent;
- (b) a cracking catalyst;
- and (c) a zinc-containing treating agent present in an amount from about 3.0 to 15.0 weight percent, calculated as the metal and based on the total weight of the solid particles.
A passivation process which comprises contacting, under cracking conditions:
- (a) a hydrocarbon feedstock;
- (b) a cracking catalyst having a contaminant metals level of at least about 600 ppm Nickel Equivalent;
- and (c) a zinc-containing treating agent present in an amount from about 3.0 to 15.0 weight percent, calculated as the metal and based on the total weight of the solid particles.
Dependencies are inferred from the claim text.