Multi-stage regeneration of catalyst with trapped CO combustion

Details Multi-stage regeneration of catalyst with trapped CO combustion Multi-stage regeneration of catalyst with trapped CO combustion

1992-12-30

1994-07-12

Breneman, R. Bruce

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208153, C10G 1100

Patent

active

053285930

ABSTRACT:
A process for multistage regeneration of spent FCC catalyst in an "Orthoflow" or stacked FCC unit having a stripper mounted over the regenerator. Spent catalyst is discharged into a fast fluidized bed coke combustor heated by direct contact heat exchange with catalyst and large particles or beads of CO combustion promoter. The large particle CO combustion promoter is trapped in the coke combustor, to permit complete CO combustion, with limited coke combustion.

REFERENCES:
patent: 3808121 (1974-04-01), Wilson
patent: 4927348 (1990-05-01), Avidan
patent: 5034115 (1991-07-01), Avidan
patent: 5101743 (1992-04-01), Hirschberg et al.

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