External method for reducing transverse oxygen gradients in FCCU

Details External method for reducing transverse oxygen gradients in FCCU External method for reducing transverse oxygen gradients in FCCU

1979-07-18

1981-01-06

Levine, Herbert

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Solids contacting and mixing

208DIG1, C10G 1118

Patent

active

042435188

ABSTRACT:
A minor portion of the regeneration gas used to regenerate spent fluid catalytic cracking catalyst is employed to combust volatile hydrocarbons in mixture with said spent catalyst prior to said mixture entering the regeneration zone. This serves to reduce and/or minimize transverse oxygen gradients in the dense phase catalyst bed and in the effluent gases therefrom such that excessive or undesirable afterburning in the dilute catalyst phase can be minimized or eliminated.

REFERENCES:
patent: 2589124 (1952-03-01), Packie
patent: 3206393 (1965-09-01), Pohlenz
patent: 4035284 (1977-07-01), Gross et al.

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