Fluidized catalyst regeneration by coke oxidation in a dense...

Details Fluidized catalyst regeneration by coke oxidation in a dense... Fluidized catalyst regeneration by coke oxidation in a dense...

B - Operations, Transporting

01

J

252/1.E

B01J 37/14 (2006.01) B01J 8/24 (2006.01) C10G 11/18 (2006.01)

Patent

CA 1078805

ABSTRACT OF THE DISCLOSURE A process for the regeneration of a coke-contaminated catalytic crack- ing catalyst removed from a hydrocarbon reaction zone, said catalyst contain- ing catalytically effective amounts of a CO conversion promoter comprising one or more oxides of metals, and for the catalytic conversion of CO, re- sulting from the oxidation of coke from said catalyst, to carbon monoxide. The process comprises the steps of: oxidizing coke in a first dense bed of catalyst maintained in a regeneration zone to produce partially spent re- generation gas and regenerated catalyst; passing the regeneration gas and regenerated catalyst to a dilute phase transport riser wherein CO is essen- tially completely converted in the presence of the CU conversion promoter to CO2 and wherein at least a portion of the heat of CO conversion is trans- ferred to the regenerated catalyst; and, passing regenerated catalyst to a second dense bed from which regenerated catalyst is returned to the hydro- carbon reaction zone.

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