Spent catalyst distribution

Details Spent catalyst distribution Spent catalyst distribution

1996-10-30

1998-06-30

Kim, Christopher

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

Regenerating or rehabilitating catalyst or sorbent

Gas or vapor treating

502 20, 502 34, 502 38, 502 42, 502 48, B01J 2034

Patent

active

057733783

ABSTRACT:
A regenerator in a FCC unit, with the reactor elevated above the regenerator and a side entry spent catalyst introduction to the regenerator, is modified by installing a spent catalyst distribution apparatus along a central vertical axis of the regenerator to radially discharge the spent catalyst and 10-50 percent of the regeneration air into the dense phase of the catalyst. The existing compressor may be used to supply the regeneration air to the spent catalyst distributor. The remaining 50-90 percent of the regeneration air is supplied to the air distribution grid. The retrofit improves spent catalyst distribution and mixing in the regenerator to avoid dilute phase CO combustion or afterburning in the offgas.

REFERENCES:
patent: 4150090 (1979-04-01), Murphy et al.
patent: 4374750 (1983-02-01), Vickers et al.
patent: 4443551 (1984-04-01), Lionetti et al.
patent: 4471063 (1984-09-01), Hettinger
patent: 4610851 (1986-09-01), Colvert et al.
patent: 5021222 (1991-06-01), Owen
patent: 5077252 (1991-12-01), Owen et al.

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