Mineral oils: processes and products – Chemical conversion of hydrocarbons – Cracking
Patent
1990-04-27
1991-07-16
McFarlane, Anthony
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Cracking
208158, 208159, 208160, 208164, 502 40, 502 43, 502 44, C10G 1100, C10G 3510, B01J 2034
Patent
active
050322516
ABSTRACT:
A process and apparatus for achieving turbulent or fast fluidized bed regeneration of spent FCC catalyst in a bubbling bed regenerator having a stripper mounted over the regenerator and a stripped catalyst standpipe within the regenerator. A closed coke combustor vessel is added to the existing regenerator vessel, and spent catalyst is discharged into the coke combustor and regenerated in a turbulent or fast fluidized bed, and discharged up into a dilute phase transport which preferably encompasses, and is in a countercurrent heat exchange relationship with, the spent catalyst standpipe. Regenerated catalyst is discharged from the dilute phase transport riser, and collected in the bubbling dense bed surrounding the coke combustor. Catalyst may be recycled from the dense bed to the coke combustor for direct contact heat exchange. Catalyst coolers may be used on catalyst recycle lines to the coke combustor, or on the line returning regenerated catalyst to the cracking reactor.
REFERENCES:
patent: 4812430 (1989-03-01), Child
Oil and Gas Journal, "Fluid Catalytic Cracking Report" by Amos A. Avidan, Michael Edwards, and Hartley Owen.
Owen Hartley
Schipper Paul H.
McFarlane Anthony
McKillop Alexander J.
Mobil Oil Corporation
Phan Nhat
Speciale Charles J.
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