Direct feed/effluent heat exchange in fluid catalytic cracking

Details Direct feed/effluent heat exchange in fluid catalytic cracking Direct feed/effluent heat exchange in fluid catalytic cracking

2011-08-30

2011-08-30

Vanoy, Timothy (Department: 1734)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

C208S20800M, C208S209000, C208S25400R

Reexamination Certificate

active

08007662

ABSTRACT:
Fluid catalytic cracking (FCC) processes are described, in which hydroprocessed hydrocarbon streams or other hydrocarbon feed streams having a low coking tendency are subjected to direct heat exchange with the FCC reactor effluent, for example in the FCC main column. The processes operate with sufficient severity such that little or no net FCC main column bottoms liquid (e.g., with a 343° C. (650° F.) distillation cut point) is generated. Regeneration temperatures with the representative low coking tendency feeds are beneficially increased by using an oxygen-enriched regeneration gas stream.

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