Metals passivation

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B - Operations, Transporting

01

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196/157, 252/3

B01J 21/20 (2006.01) B01J 23/18 (2006.01) B01J 29/076 (2006.01) B01J 29/90 (2006.01) C10G 11/05 (2006.01) C10G 11/18 (2006.01)

Patent

CA 2033717

Abstract A zeolite-containing catalytic cracking catalyst is passivated by treatment with an aqueous solution which has been prepared by mixing an antimony oxide, ammonium bifluoride and water. The thus-passivated catalyst is used in a process for catalytically cracking a hydrocarbon-containing feed, in particular one which contains metal impurities. In one embodiment, the above-described aqueous solution is injected into the feed. In other embodiments, the solution is injected into the cracking zone or into a catalyst regeneration zone.

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