Processes employing fluent solids

Claim 1

IN A HYDROCARBON CONVERSION SYSTEM IN WHICH SOLID PARTICULATE HYDROCARBON CONVERSION CATALYST CONTINUOUSLY CIRCULATES THROUGH A SYSTEM WHERIN FRESHLY REGENERATED CATALYST CONTACTS HYDROCARBONS UNDER CONVERSION CONDITIONS IN A HYDROCARBON CONVERSION ZONE AND THEREBY CONCOMITANTLY ACCUMULATES A DEPOSIT OF COKE; WHEREIN COKED CATALYST FROM TEH CONVERSION ZONE CONTACTS OXYGEN CONTAINING GAS UNDER CONBUSTION CONDITIONS IN A SERIES OF VERTICALLY SUPERIMPOSED ADJACENT REGENERATION ZONES IN COMPACT NONTURBULENT BED FORM 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 INTRODUCING OXYGEN CONTAINING GAS AS SEPARATE STREAMS TO THE UPPERMOST AND TO THE LOWERMOST OF SAID SERIES OF REGENERATION ZONES, AT LEAST THE STREAM OF OXYGEN CONTAINING GAS INTRODUCED TO THE LOWERMOST REGENERATION ZONE BEING AT A PRESSURE SUBSTANTIALLY ABOVE THE PRESSURE AT THE BOTTOM OF SAID LIFTING ZONE; PASSING OXYGEN CONTAINING GAS THROUGH THE BED OF CATALYST IN THE UPPERMOST ZONE; DISCHARGING RELATIVELY WET FLUE GAS FROM SAID UPPERMOST ZONE; PASSING OXYGEN CONTAINING GAS THROUGH THE BED OF CATALYST IN THE LOWERMOST ZONE UNDER FLOW