Fluid contact coking in the presence of hydrogen produced by dehydrogenation of product gases

Claim 1

THE PROCESS OF PRODUCING A SUPERIOR GAS OIL ADAPTED FOR CATALYTIC CRACKING THAT COMPRISES CONTACTING A RESIDUAL PETROLEUM STOCK WITH COKE UNDER FLUIDIZED CONDITIONS AT CRACKING AND COKING TEMPERATURE IN A REACTION ZONE, PASSING COKE FROM THE REACTION ZONE TO A BURNING ZONE IN WHICH THE COKE IS SUBJECTED TO COMBUSTION AT A TEMPERATURE OF AT LEAST 1500* F., WITHDRAWING COKE AT A TEMPERATURE OF AT LEAST 1500* F. FROM THE BURNING ZONE, WITHDRAWING VAPORS COMPRISING HYDROCARBON GAS FROM SAID REACTION ZONE, DISPERSING SAID COKE WITHDRAWN FROM SAID BURNING ZONE IN SAID HYDROCARBON GAS AND PASSING THE DISPERSION THROUGH A DEHYDROGENATION ZONE AT A TEMPERATURE OF ABOUT 1200 TO 2000* F. FOR A TIME OF ABOUT 0.1 TO 20.0 SECONDS EFFECTING DEHYDROGENATION AND FORMATION OF HYDROGEN DELIVERING EFFLUENT FROM THE DEHYDROGENATION ZONE COMPRISING COKE AND HYDROGEN TO THE AFORESAID REACTION ZONE TO SUPPLY HEAT THERETO AND MAINTAIN FLUIDIZATION THEREIN IN AN ATMOSPHERE OF HYDROGEN AND FRACTIONATING EVOLVED VAPORS FROM SAID REACTION ZONE TO SEPARATE SAID GAS OIL.