Process and apparatus for split feed of spent catalyst to high e

Details Process and apparatus for split feed of spent catalyst to high e Process and apparatus for split feed of spent catalyst to high e

1991-11-05

1992-06-30

Morris, Theodore

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208121, 208147, 208155, 208156, 208157, 208161, 502 43, 422144, 422145, 422147, C10G 1100

Patent

active

051260360

ABSTRACT:
A process and apparatus for regeneration of coked catalyst used in the fluidized cracking of heavy oils is disclosed. A high efficiency catalyst regenerator, with a fast fluidized bed coke combustor, dilute phase transport riser, and second fluidized bed is used but modified so that at least some coked catalyst is added directly to the second fluidized bed. The coked catalyst can be heated by direct contact heat exchange in the second fluidized bed and then charged to the coke combustor, or the coked catalyst can be regenerated in the second fluidized bed, or some combination of both. Adding catalyst to the second fluidized bed increases the coke burning capacity of these regenerators, and/or permits a drier regeneration.

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