Residual oil cracking process using dry gas as lift gas...

Details Residual oil cracking process using dry gas as lift gas... Residual oil cracking process using dry gas as lift gas...

C - Chemistry, Metallurgy

10

G

196/97

C10G 11/05 (2006.01) C10G 11/18 (2006.01) C10G 47/30 (2006.01)

Patent

CA 1265464

-62- ABSTRACT Wet gas (containing little C3+ and almost no C5+) is substituted for wet gas (generally containing C3+ and C5+) and used as the lift gas for transporting catalyst through a hydrocarbon conversion riser e.g. metal removal system, fluid catalytic cracker, and RCCsm heavy oil cracking process. Preferably the hydrocarbon feed contacts the catalyst-lift gas mixture after some period of acceleration and mixing and passivation of contaminants on the catalyst surface. Advantages include lower gasing and lower coke-make as well as better product selectivity. Preferred catalyst-lift gas contact times are from about 0.01 to 2, more preferably 0.05 to 1.5, and most preferably 0.15 to 1 second. Preferred lift gas hydrogen contents are at least about 10, more preferably 15 and most preferably 20 mol percent hydrogen. 6224aus/application RI-6224A

466631

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