Method for the injection of catalyst in a fluid catalytic cracki

Details Method for the injection of catalyst in a fluid catalytic cracki Method for the injection of catalyst in a fluid catalytic cracki

1986-02-07

1989-05-23

Caldarola, Glenn

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Solids contacting and mixing

208113, 208153, C10G 1105, B01J 2938

Patent

active

048328251

ABSTRACT:
The invention relates to a method and apparatus for injecting and conditioning regenerated catalyst particles at the base of a catalytic cracking reactor/elevator below the zone where the feedstock to be cracked is injected to give better uniformity of treatment and control of the effective C/O ratio. A first fluid is injected at a low rate into the reactor below the level where the catalyst particles coming from the regenerator are introduced so as to form a dense phase fluidized bed, and a second fluid is injected at a higher rate substantially above the zone where the catalyst particles coming from the regenerator enter so as to form a homogenized dilute phase fluidized bed of catalyst prior to subsequent contact with the feedstock to be treated.

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