Device for redistribution of catalyst in the FCC risers

Details Device for redistribution of catalyst in the FCC risers Device for redistribution of catalyst in the FCC risers

2006-12-19

2010-02-09

Bhat, N. (Department: 1797)

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Fluidized bed

C422S214000, C422S215000, C422S224000

Reexamination Certificate

active

07658889

ABSTRACT:
In a catalytic FCC cracking unit comprising a vertically disposed riser housing a reaction zone, the improvement comprising at least one device for redistribution of catalyst inside said reaction zone, the catalytic cracking unit being equipped at a plane with feedstock injectors, and an upper plane, with mixed temperature control (MTC) injectors, wherein said device has the general shape of a continuous ring adjacent the riser wall and along the inside periphery of said wall, said device creating a restriction in the cross section of the riser ranging between 30% and 45%, having a profile section at least partially rectilinear, and being located a) either in a zone encompassed between the plane of the feedstock injectors and the plane of the MTC injectors, b) or at a height of between 0.1 and 5 meters above the plane of the MTC injectors.

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patent: 6613290 (2003-09-01), Senior
patent: 2002/0112988 (2002-08-01), Mauleon et al.

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