Passivation of cracking catalyst

Details Passivation of cracking catalyst Passivation of cracking catalyst

C - Chemistry, Metallurgy

10

G

196/106

C10G 11/00 (2006.01) B01J 37/18 (2006.01) C10G 11/04 (2006.01) C10G 11/18 (2006.01)

Patent

CA 1240946

ABSTRACT OF THE DISCLOSURE PASSIVATION OF CRACKING CATALYST A process for passivating the adverse cata- lytic effects of metal contaminants, such as nickel, vanadium and iron, in a cracking system com- prising a reaction zone, a regeneration zone and a passivation zone and wherein a passivation promoter selected from the group consisting of cadmium-tin mix- tures, cadmium, germanium, indium, tellurium and zinc and mixtures thereof is added to the cracking system. The passivation zone is maintained at an elevated temperature and may also have a reducing atmosphere.

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