Hydrocracking of heavy oils

Claim 1

THE COMBINATION FLUID-TYPE PROCESS FOR COKING AND CRACKING A HEAVY OIL WHICH COMPRISES INTRODUCING THE HEAVY OIL INTO A BODY OF COKE PARTICLES MAINTAINED IN FLUIDIZED CONDITION IN A COKING ZONE BY INJECTION THEREIN OF A WATER GAS MIXTURE, SELEVTIVELY REMOVING LARGE COKE PARTICLES AS FORMED FROM THE COOKING ZONE TO THE SUBSTANTIAL EXCLUSION OF SMALLER PARTICLES BY SIZE CLASSIFYING THE COKE PARTICLES BY MEANS OF AN ELUTRIATING GAS PASSING INTO THE BODY OF COKE PARTICLES AND CONTACTING A FLUID SUSPENSION OF SAID LARGE COKE PARTICLES WITH STREAM IN A SEPARATE ZONE TO GENERATE A WATER GAS MIXTURE, RETURNING SAID WATER GAS MIXTURE TO THE COKING ZONE AS THE FLUIDIZING MEDIUM, TAKING OFF THE HYDROCARBON OVERHEAD FROM THE COKING ZONE AND ADMIXING SAME WITH ACTIVATED COKE PARTICLES FROM THE WATER GAS GENERATION ZONE SO AS TO PROVIDE A FLUID SUSPENSION, CRACKING SAID FLUID MIXTURE AT ELEVATED TEMEPRATURES IN THE RANGE APPROXIMATING 900* TO 1100* F. FOR A TIME SUFFICIENT TO PRODUCE LIGHT GASOLINERANGE BOILING HYDROCARBONS, AND SEPARATING SAID GASOLINE PRODUCTS FROM THE EFFLUENT.