Two catalyst stage hydrocarbon cracking process

Details Two catalyst stage hydrocarbon cracking process Two catalyst stage hydrocarbon cracking process

C - Chemistry, Metallurgy

10

G

196/147

C10G 47/02 (2006.01) C10G 69/04 (2006.01)

Patent

CA 2011594

In a two stage catalytic cracking process a heavy cycle gas oil fraction (HCGO) nominal boiling range 600°F to 1050°F, API gravity of -10° to +10° and 65 to 95 vol% aromatics is recycled to extinction between an ebullated bed hydrocracking zone and a fluidized catalytic cracking zone to yield a liquid fuel and lighter boiling range fraction as the light fraction from each zone. The catalyst in the fluidized catalytic cracking zone is maintained at a micro activity 68 to 72 while cracking a virgin gas oil to HCGO. HCGO is then mixed with vacuum residuum and hydrocracked in an ebullated bed reactor. The mid range fraction is recycled to the fluidized catalytic cracking zone. The 1000°F+ fraction is blended with a fuel oil.

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