Desulfurization of fluid coke with oxygen and hydrogen

Claim 1

A PROCESS FOR DESULFURIZING COKE PARTICLES CONTAINING A HIGH PERCENTAGE OF SULFUR, SAID PARTICLES HAVING BEEN PRODUCED BY CONTACTING A HEAVY PETROLEUM OIL COKING CHARGE STOCK AT A COKING TEMPERATURE WITH A BODY OF COKE PARTICLES MAINTAINED IN THE FORM OF A DENSE TURBULENT FLUID IZED BED IN A REACTION ZONE, WHEREIN THE OIL IS CONVERTED TO PRODUCT VAPORS AND CARBONACEOUS SOLIDS ARE CONTINUOUSLY DEPOSITED ON THE COKE PARTICLES, REMOVING PRODUCT VAPORS FROM THE COKING ZONE; BURNING A PORTION OF COKE PARTICLES REMOVED FROM THE COKING ZONE IN A SEPARATE BURNING ZONE TO INCREASE THE TEMPERATURE OF SAID FLUIDIZED PARTICLES, RETURNING A PORTION OF THE HEATED COKE PARTICLES FROM THE BURNING ZONE TO THE COKING ZONE AND WITHDRAWING PRODUCT PARTICLES WHICH COMPRISES THE STEPS OF TREATING THE COKE PARTICLES WITH AN OXYGEN-CONTAINING GAS AT A TEMPERATURE IN THE RANGE OF 600* - 1000* F. FOR FROM 15 MINUTES TO 50 HOURS SO AS TO OBTAIN A MINIMUM COKE YIELD OF 80 WT. PERCENT AND TREATING THE THUS OXIDIZED COKE WITH HYDROGEN AT A TEMPERATURE IN THE RANGE OF 1200* - 700* F. WITH A MINIMUM OF 100 V./V./HR. OF HYDROGEN WHEREBY THE SULFUR CONTENT OF COKE IS REDUCED TO BELOW 3 WEIGHT PER CENT.