Catalyst stripping of fouled catalysts employed in hydrocarbon conversion processes

Claim 1

IN A CATHLYTIC CONVERSION PROCESS WHEREIN FLUIDIZED SOLIDS ARE CONTACTED WITH HYDROCARBON VAPORS IN A CONVERSION ZONE UNDER CONDITIONS FOR EFFECTING CONVERSION AND THE ACCUMULATION OFR CARBONACEOUS DEPOSITS ON SAID SOLIDS, ARE PASSED THROUGH A STRIPPING ZONE FOR THE REMOVAL OF VAPORIZABLE HYDROCARBON MATERIAL, ARE REGENERATED IN A REGENERATION ZONE TO EFFECT COMBUSTION OF SAID CARBONACEOUS DEPOSITS THEREBY INCREASING THE SENSIBLE HEAT CONTAINED IN SAID SOLIDS AND ARE FINALLY RETURNED TO THE CONVERSION ZONE FOR SUPPLYING HEAT THERETO AND FOR EFFECTING FURTHER CONVERSION, THE IMPROVED METHOD OF OPERATION WHICH COMPRISES INTRODUCING ONE STREAM OF HOT REGENERATED CATALYST FROM SAID REGENERATION ZONE TO SAID CONVERSION ZONE, INTRODUCING ANOTHER STREAM OF HOT REGENERATED CATALYST DIRECTLY FROM SAID RE- SAID REGENERATION ZONE TO SAID STRIPPING ZONE, INTERMINGLING CATALYST FROM SAID LAST-NAMED STREAM WITH CATALYST FROM THE CONVERSION ZONE IN THE UPPER PART OF SAID STRIPPING ZONE, STRIPPING THE INTERMINGLED CATALYST IN SAID STRIPPING ZONE AND RETURNING THE INTERMINGLED STRIPPED CATALYST FROM THE BASE OF THE STRIPPING ZONE TO THE REGENERATION ZONE.