Bubbling dense bed catalyst regenerator with higher efficiency b

Details Bubbling dense bed catalyst regenerator with higher efficiency b Bubbling dense bed catalyst regenerator with higher efficiency b

1991-02-06

1992-09-01

Konopka, Paul E.

Catalyst, solid sorbent, or support therefor: product or process

Regenerating or rehabilitating catalyst or sorbent

Gas or vapor treating

34 57A, 208113, 422144, 502 40, 502 41, B01J 3834, B01J 2120, C10G 1118, F27B 1508

Patent

active

051438755

ABSTRACT:
A process and apparatus for fluidized bed catalyst regeneration. The regenerator contains a base fluidized bed, a bubbling dense bed above the base fluidized bed, and a dilute phase region above the bubbling dense bed. The bubbling dense bed has a larger cross sectional area than the base bed. Most, preferably all, the regeneration gas is added to the base fluidized bed. Higher superficial vapor velocities in the base fluidized bed, with conventional vapor velocities in the bubbling dense bed, allow more efficient regeneration in the base bed, without excessive catalyst entrainment into the dilute phase. Regenerated catalyst may be recycled from the bubbling dense bed or the dilute phase to the base fluidized bed, preferably via a cyclone dipleg.

REFERENCES:
patent: 2366372 (1945-01-01), Voorhees
patent: 2595909 (1952-05-01), Trainer et al.
patent: 3817280 (1974-06-01), Celani
patent: 4051069 (1977-09-01), Bunn, Jr. et al.
patent: 4056486 (1977-11-01), Bunn, Jr. et al.
patent: 4071573 (1978-01-01), Owen et al.
patent: 4624771 (1986-11-01), Lane et al.

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