Moving catalyst conveesion system

Claim 1

IN THE OPERATION OF A HYDROCARBON CONVERSION SYSTEM, THE METHOD OF REGENERATING SOLID GRANULAR HYDROCARBON CONVERSION CATALYST CONTAINING COMBUSTIBLE DEPOSIT, WHICH COMPRISES PASSING SUCH CATALYST DOWNWARDLY AS SEPARATE LATERALLY CONFINED COMPACT BEDS THROUGH VERTICALLY SPACED CONSECUTIVE COMBUSTION ZONES, SEPARATELY ADMITTING REGENERATING GAS TO EACH OF SAID COMBUSTION ZONES, SAID REGENERATING GAS BEING ADMITTED TO A LOWER COMBUSTION ZONE AT A PRESSURE GREATER THAN THAT OF ADMISSION OF REGENERATING GAS TO THE COMBSTION ZONE THEREABOVE, FLOWING THE GAS ADMITTED TO EACH ZONE THROUGH THE COMPACT BED OF CATALYST IN SUCH ZONE; SEPARATELY WITHDRAWING AT THE TOP OF EACH OF THE RESPECTIVE BEDS FLUE GAS PRODUCED IN BURNING THE BOMBUSTIBLE DEPOSIT IN THE CATALYST OF THE RESPECTIVE BEDS, THE LOWERMOST OF SAID CATALYST BEDS BEING MAINTAINED AT A LATERAL CROSS-SECTION MATERIALLY GREATER THAN THE CROSS-SECTION OF THE UPPERMOST OF SAID BEDS SO THAT THE PRESSURE DROP PER LINEAR UNIT OF HEIGHT FOR A GIVEN GAS VOLUME IS LOWER IN SAID BED OF GREATER LATERAL CROSS-SECTION, DISCHARGING THE FLUE GAS FROM THE LOWERMOST BED AT HIGHER PRESSURE THAN FROM THE BED THEREABOVE, DISCHARGING REGENERATED CATALYST FROM SAID LOWERMOST BED, AND UTILIZING THE FLUE GAS SO DISCHARGED FROM THE LOWERMOST BED AS A GASEOUS IMPELLING MEDIUM FOR ELEVATION OF CATALYST IN THE SYSTEM TO A DESIRED HEIGHT.