Apparatus for the catalytic cracking in the fluid state of hydro

Details Apparatus for the catalytic cracking in the fluid state of hydro Apparatus for the catalytic cracking in the fluid state of hydro

1992-10-05

1995-07-04

Pal, Asok

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

208113, 208119, 208120, 208150, 208151, 208154, 422144, 422145, C07C 700, C10G 1102, C10G 1104, F27B 1508

Patent

active

054302226

ABSTRACT:
An apparatus for the catalytic cracking in the fluid state of hydrocarbon feedstocks which comprises a riser-type column (2); at the top of the riser (2) and concentric therewith, a chamber (1) for separation of the hydrocarbon vapors and the coke-laden catalyst particles; directly above the upper opening of the riser (2) and in the interior of said chamber (1), a ballistic separator (3); at least one unit for regeneration of the spent catalyst, fed by stripped particles received from said chamber. The chamber (1) for separation of the coke-laden catalyst particles and the stripping thereof comprises, at a level intermediate between the bed (6) of particles being stripped and the opening of the riser (2), a means (11) adapted to form a baffle for locally reducing the diameter of said chamber (1) and the free passage at the periphery of the riser (2), thereby reducing recirculating streams of hydrocarbon vapors in separation chamber (1) of the FCC unit thus avoiding overcracking.

REFERENCES:
patent: 4574044 (1986-03-01), Krug
patent: 4875993 (1989-10-01), Mauleon et al.
patent: 5015363 (1991-05-01), Cetinkaya

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