Processes employing fluent solids

Claim 1

IN A HYDROCARBON CONVERSION SYSTEM IN WHICH SOLID PARTICULATE HYDROCARBON CONVERSION CATALYST CONTINUOUSLY CIRCULATES THROUGH A SYSTEM WHEREIN FRESHLY REGNERATED CATALYST CONTACTS HYDROCARBONS UNDER CONVERSION CONDITIONS IN A HYDROCARBON CONVERSION ZONE AND THEREBY CONCOMITANTLY ACCUMULATES A DEPOSITE OF COKE; WHEREIN COKED CATALYST FROM THE CONVERSION ZONE CONTACTS OXYGEN CONTAINING GAS UNDER COMBUSTION CONDITIONS SO AS TO REMOVE AT LEAST A PORTION OF SAID COKE; AND WHEREIN CATALYST IS ELEVATED UPWARDLY IN AT LEAST ONE LIFTING ZONE BY A LIFTING GAS FOR SUBSEQUENT FLOW DOWNWARDLY THROUGH OTHER ZONES IN THE SYSTEM: THE IMPROVEMENT WHICH COMPRISES PASSING SAID COKED CATALYST DOWNWARDLY THROUGH A SERIES OF VERTICALLY SUPERIMPOSED ADJACENT REGENERATION ZONES IN COMPACT NON-TURBULENT BED FORM; INTRODUCING OXYGEN CONTAINING GAS AS SEPARATE STREAMS TO THE UPPERMOST AND TO THE LOWERMOST OF SAID SERIES OF REGENERATION ZONES; PREFERENTIALLY BURNING HYDROGEN IN SAID DEPOSIT OF COKE SO AS TO PRODUCE RELATIVELY WET FLUE GAS IN SAID UPPERMOST ZONE; DISCHARGING SAID RELATIVELY WET FLUE GAS FROM SAID UPPERMOST ZONE; DISCHARGING RELATIVELY DRY GAS FROM SAID LOWERMOST ZONE; AND ELEVATING CATLYST THROUGH SAID LIFTING ZONE BY RELATIVELY WET LIFTING GAS PREDOMINANTLY COMPRISING RELATIVELY WET FLUE GAS FROM SAID UPPERMOST ZONE.