Process for control of multistage catalyst regeneration with ful

Details Process for control of multistage catalyst regeneration with ful Process for control of multistage catalyst regeneration with ful

1990-07-17

1991-04-30

Davis, Curtis R.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208155, 208159, 502 42, 502 43, C10G 1100

Patent

active

050115928

ABSTRACT:
A process for controlled, multi-stage regeneration of FCC catalyst is disclosed. A modified high efficiency catalyst regenerator, with a fast fluidized bed coke combustor, dilute phase transport riser, and second fluidized bed regenerates the catalyst in at least two stages. The primary stage of regeneration is in the coke combustor, at full CO oxidation conditions. The second stage of catalyst regeneration occurs in the second fluidized bed, at partial CO combustion conditions. The process permits regeneration of spent FCC catalyst while minimizing NOx exmissions and achieving significant reduction of SOx.

REFERENCES:
patent: 4211636 (1980-07-01), Gross et al.
patent: 4211637 (1980-07-01), Gross et al.
patent: 4664778 (1987-05-01), Reinkemeyer
patent: 4849091 (1989-07-01), Cabrera et al.

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