Active bed fluidized catalyst stripping

Details Active bed fluidized catalyst stripping Active bed fluidized catalyst stripping

1993-09-27

1995-01-10

Konopka, Paul E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208150, 208151, 208164, 422144, 422145, 502 41, 502 55, C10G 1100, B01J 3806, B01J 826, F27B 1502

Patent

active

053804260

ABSTRACT:
A fluidized catalytic cracking process and apparatus with an active bed annular spent catalyst stripper is disclosed. An annular catalyst stripper disposed about a riser reactor is separated, by a baffle or fluid flow, into a secondary stripper nearer the catalyst regenerator and a primary stripper on the far side of the annular stripper from the regenerator. Catalyst flows through the primary stripper as a dense bed, to a transport means which lifts catalyst to the inlet of the secondary stripper. The "dead" region on side of annular strippers far from the regenerator is eliminated. Preferably catalyst is added to the primary stripper via cyclone diplegs, and a cyclone is used on the transport outlet.

REFERENCES:
patent: 3005771 (1961-10-01), Baars et al.
patent: 3123547 (1964-03-01), Palmer et al.
patent: 4043899 (1977-08-01), Anderson et al.
patent: 5248408 (1993-09-01), Owen

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