Low NO.sub.x FCC regeneration process and apparatus

Details Low NO.sub.x FCC regeneration process and apparatus Low NO.sub.x FCC regeneration process and apparatus

1992-09-18

1994-05-03

McFarlane, Anthony

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208152, 208254R, 502 42, C10G 1118

Patent

active

053084730

ABSTRACT:
A process and apparatus for fluidized bed regeneration of FCC catalyst are disclosed. Oxides of nitrogen (NO.sub.x) emissions from an FCC regenerator operating in complete CO combustion mode, and hydrothermal catalyst deactivation, are reduced by reducing the average bed temperature. Dilute phase afterburning superheats catalyst entrained in the dilute phase region above the fluidized bed. Cyclone separators recover superheated, entrained catalyst and preferentially recycle this catalyst to the FCC reactor, permitting cooler operation of the dense phase fluidized bed.

REFERENCES:
patent: 4317798 (1982-03-01), Worley
patent: 4755282 (1988-07-01), Samish et al.
patent: 4810360 (1989-03-01), Haddad et al.
patent: 4853107 (1989-08-01), Haddad et al.
patent: 4980048 (1990-12-01), Leib et al.
patent: 5047140 (1991-09-01), Owen et al.
patent: 5130012 (1992-07-01), Edwards et al.

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