Fluidized solid catalyst regenerationrejuvenation system

Claim 1

IN A FLUIDIZED SOLIDS CATALYST HYDROFORMING SYSTEM EMPLOYING A CATALYST WHICH REQUIRES PERIODIC REJUVENATION IN ORDER TO MAINTAIN IT AT HIGH ACTIVITY AND LOW RATE OF ACTIVITY DECLINE, THE METHOD OF TREATING CATALYST FROM THE CONVERSION ZONE BEFORE RETURNING IT THERETO WHICH COMPRISES INTRODUCING SAID CATALYST TO A REGENERATION ZONE IN A UNITARY REGENERATION-REJUVENATION VESSEL, BURNING CARBONACEOUS DEPOSITS FROM THE CATALYST IN SAID REGENERATION ZONE BY PASSING UPWARDLY THEREIN A HOT OXYGEN-CONTAINING STREAM WHICH HAS PREVIOUSLY BEEN UTILIZED FOR EFFECTING CATALYST REJUVENATION, PASSING SAID STREAM UPWARDLY IN THE REGENERATION ZONE AT A RATE TO MAINTAIN A TURBULENT DENSE PHASE OF ACTALYST THEREIN, REMOVING HEAT FROM THE REGENERATION ZONE AT A RATE TO MAINTAIN THE DENSE PHASE THEREIN AT A TEMPERATURE IN THE RANGE OF ABOUT 850 TO 1250* F., SEPARATING CATALYST FROM FLUE GAS IN THE UPPER PART OF THE REGENERATION ZONE, WITHDRAWING CATALYST FROM THE REGENERATION ZONE FOR RETURN TO THE CONVERSION ZONE, SEPARATELY WITHDRAWING PART OF THE CATALYST FROM THE DENSE PHASE IN THE REGENERATION ZONE TO A SEPARATE REJUVENATION ZONE WHICH IS WITHIN SAID VESSEL AND WHICH COMMUNICATES THROUGH A MERGING ZONE WITH THE DENSE CATALYST PHASE IN THE REGENERATION ZONE, INTRODUCING A HOT OXYGEN-CONTAINING GAS AT A TEMPERATURE IN THE RANGE OF 950 TO 1300* F. AT THE BASE OF SAID AREJUVENATION ZONE, SAID GAS HAVING AN OXYGEN PARTIAL PRESSURE GREATER THAN 4 ATMOSPHERE, AND PASSING SAID HOT OXYGEN-CONTAINING GAS FROM THE TOP OF THE REJUVENATION ZONE THROUGH SAID MERGING ZONE TO THE BASE OF THE DENSE CATALYST PHASE IN THE REGENERATION ZONE.