FCC process with two zone short contact time reaction conduit

Details FCC process with two zone short contact time reaction conduit FCC process with two zone short contact time reaction conduit

1997-12-05

2000-01-04

Myers, Helane

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208151, 208150, 208164, 208159, 208153, C10G 100

Patent

active

060106182

ABSTRACT:
An FCC process provides ultrashort catalyst and feed contacting in an FCC riser by recovering a short contact product stream in an intermediate section of the riser. The remainder of the catalyst and gas mixture continues through the riser along a continuous flow path for further for controlled cracking of the heavier adsorbed hydrocarbons and entrained hydrocarbons. Residual catalyst separated from the recovery of the short contact product stream returns to the upstream end of the riser for recycle. The section of the riser downstream of the short contact product recovery may receive additional feed to perform secondary cracking reactions. The riser arrangement greatly simplifies methods for performing ultra short FCC feed and catalyst contacting.

REFERENCES:
patent: 4960503 (1990-10-01), Haun et al.
patent: 4985136 (1991-01-01), Bartholic
patent: 4998136 (1991-03-01), Bartholic
patent: 5017343 (1991-05-01), Cetinkaya
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patent: 5324419 (1994-06-01), Muldowney
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patent: 5451313 (1995-09-01), Wegerer
patent: 5565020 (1996-10-01), Niewiedzial
patent: 5584986 (1996-12-01), Bartholic
patent: 5858907 (1999-01-01), Lomas

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