Catalyst regeneration process and apparatus

Details Catalyst regeneration process and apparatus Catalyst regeneration process and apparatus

C - Chemistry, Metallurgy

10

G

196/105, 196/113

C10G 11/18 (2006.01) C10G 11/05 (2006.01)

Patent

CA 1142870

ABSTRACT A catalyst regeneration process and apparatus for the oxidation of coke from a spent catalyst, said coke being con- verted to CO, and for the conversion of the CO to CO2, Hot regenerated catalyst is recycled from a dense bed in the re- generation zone to mix with incoming spent catalyst in a riser- mixer. The riser-mixer operates in dense phase and is supplied with a relatively small amount of a fluidizing medium, prefer- ably air. After the mixing of spent and fresh catalyst is sub- stantially completed, a relatively large amount of a regenerating gas, preferably air, is admixed with the catalyst mixture, and some coke oxidation occurs. The balance of coke oxidation takes place in a downstream-situated regeneration zone of substantially conventional design. The regenerating gas addition is preferably made at the base of a cone-shaped combustor in order to provide venturi effect which ensures good air-catalyst mixing.

345564

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