Catalyst regeneration process

Details Catalyst regeneration process Catalyst regeneration process

1978-05-22

1980-04-08

Levine, Herbert

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Solids contacting and mixing

252417, 422144, B01D 1500, B01J 3712, C10G 1318

Patent

active

041971892

ABSTRACT:
A catalyst regeneration process and apparatus for the oxidation of coke from a spent catalyst, said coke being converted to CO, and for the conversion of the CO to CO.sub.2. Hot regenerated catalyst is recycled from a dense bed in the regeneration 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, preferably air. After the mixing of spent and fresh catalyst is substantially 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 a venturi effect which ensures good air-catalyst mixing.

REFERENCES:
patent: 2589124 (1952-03-01), Packie
patent: 2788311 (1957-04-01), Howard et al.
patent: 2894825 (1959-07-01), Beavon
patent: 3893812 (1975-06-01), Conner et al.
patent: 3970587 (1976-07-01), Shinnar et al.

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