Method of regenerating coke-contaminated catalyst with simultane

Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants

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Details

252417, 208113, 208120, 208164, B01J 2120, B01J 2938, C10G 1104, C10G 1118

Patent

active

041087950

ABSTRACT:
A method for regenerating a coke-contaminated cracking catalyst with the simultaneous carefully controlled combustion of CO to CO.sub.2 within a regeneration zone to produce regenerated catalyst and flue gas. Novel features of the method include adding to the regeneration zone, independently of the cracking catalyst, a liquid comprising a soluble CO oxidation promoter selected from the group consisting of the noble metals and compounds thereof and combusting CO to CO.sub.2 in the presence of the promoter and regenerated catalyst. The liquid may be added to the regeneration zone in amounts to control the CO concentration in the flue gas, a regeneration zone temperature, or the residual carbon concentration on regenerated catalyst.

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