Method for suppressing the poisoning effects of contaminant...

Details Method for suppressing the poisoning effects of contaminant... Method for suppressing the poisoning effects of contaminant...

C - Chemistry, Metallurgy

10

G

196/100

C10G 11/00 (2006.01) B01J 21/20 (2006.01) C10G 9/28 (2006.01) C10G 11/04 (2006.01) C10G 11/18 (2006.01)

Patent

CA 1303541

ABSTRACT OF THE DISCLOSURE Poisoning of a cracking catalyst by contaminant metals such as nickel, vanadium and iron during fluid catalytic cracking of hydrocarbon charge stock containing the contaminant metals is suppressed by depositing minor amounts of a bismuth-containing passivating agent on the catalyst, desirably, a weight ratio of bismuth to nickel equivalents (nickel + 0.2 vanadium + 0.1 iron) of about 0.01:1 to about 1:1. The passivating agent can also comprise mixtures of compounds of bismuth and antimony, bismuth and tin.

565730

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