FCC process with lift gas

Details FCC process with lift gas FCC process with lift gas

1993-03-08

1995-02-14

Myers, Helane

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Solids contacting and mixing

208161, 208164, 208113, C10G 1118

Patent

active

053892372

ABSTRACT:
A process for fluidized catalytic cracking of heavy feed using a low H.sub.2 S content lift gas in the base of a riser reactor. The lift gas is a recycled, ethylene rich stream obtained by removing H.sub.2 S from a compressed vapor stream intermediate the FCC main column receiver and the gas plant associated with the FCC unit. The low H.sub.2 S lift gas does not increase SO.sub.x emissions from the regenerator as much as a recycled vapor from the FCC main column. As the lift gas is not purified in the gas plant it does not overload it.

REFERENCES:
patent: 3406112 (1968-10-01), Bowles
patent: 4479870 (1984-10-01), Hammershaimb et al.
patent: 4988430 (1991-01-01), Sechrist et al.
patent: 5007999 (1991-04-01), Chen
patent: 5268090 (1993-12-01), Lomas et al.

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