Process for catalytic cracking two integrated cracking zones...

Details Process for catalytic cracking two integrated cracking zones... Process for catalytic cracking two integrated cracking zones...

2006-03-07

2006-03-07

Nguyen, Tam M. (Department: 1764)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

C208S123000, C208S146000

Reexamination Certificate

active

07008527

ABSTRACT:
The invention consists in implanting an inner tube fed at its lower portion by a fraction of regenerated catalyst inside a riser (1) of an FCC unit that is fed by catalyst via a line (14) and a feedstock via a line (3), whereby the fluid that allows this feed can be inert, in which case a staging effect of the catalyst inside the riser or else a feedstock (14) that has a tendency toward a more severe cracking inside the inner tube, then leading to an additional production of olefins, in particular propylene, is advantageous. The mixtures of fluids and catalyst are cooled above the tube via a line (13) of an inert fluid.

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patent: 4820493 (1989-04-01), Haddad et al.
patent: 1174094 (1998-02-01), None
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patent: 0 312 428 (1989-04-01), None
patent: 0849347 (1998-06-01), None
patent: 2216896 (1989-10-01), None

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