Apparatus and method for hydrocarbon conversion of two separate feeds

Claim 1

A HYDROCARBON CONVERSION PROCESS WHICH COMPRISES MAINTAINING A FLUIDIZED BED OF FINELY SUBDIVIDED SOLID CATALYST PARTICLES IN AN UPPER REACTION ZONE AND A LOWER REGENERATION ZONE DISPOSED IN SUBSTANTIALLY VERTICAL ALIGNMENT, PASSING A FIRST HYDROCARBON REACTANT HEAVIER THAN GASOLINE IN CONTACT WITH FRESHLY REGENERATED CATALYST WITHDRAWN FROM THE LOWER PORTION OF THE REGENERATION ZONE UPWARDLY AS A DILUTE SUSPENSION THROUGH AT LEAST ONE ELONGATED CONFINED ZONE THROUGH SAID REGENERATION ZONE TO A LEVEL ABOVE THE BED OF CATALYST IN SAID REACTION ZONE, SAID CONTACT BETWEEN SAID FIRST HYDROCARBON REACTANT AND SAID FRESHLY REGENERATED CATALYST IN SAID CONFINED ZONES NOT TO EXCEED A TIME GREATER THAN ABOUT FOUR SECONDS, THEREAFTER SEPARATING HYDROCARBON CONVERSION PRODUCTS OF SAID FIRST HYDROCARBON REACTANT BY SEPARATING CATALYST FROM SAID HYDROCARBON SUBSTANTIALLY IMMEDIATELY UPON DISCHARGE FROM SAID ELONGATED CONFINED ZONE, PASSING A SECOND HYDROCARBON FRACTION MORE REFRACTORY THAN SAID FIRST HYDROCARBON FRACTION UPWARDLY THROUGH SAID DENSE FLUIDIZED BED OF CATALYST IN SAID REACTION ZONE FOR A CONTACT TIME NOT LESS THAN ABOUT 3 SECONDS AND AT A LOWER TEMPERATURE THAN EMPLOYED IN SAID DILUTE SUSPENSION CONTACT STEP, WITHDRAWING HYDROCARBON PRODUCTS OF SAID FIRST AND SECOND CONTACT STEP FROM THE UPPER PORTION OF SAID REACTION ZONE, WITHDRAWING CONTAMINATED CATALYST FROM SAID REACTION ZONE, STRIPPING SAID WITHDRAWN CONTAMINATED CATALYST IN A STRIPPING ZONE ADJACENT TO SAID REACTION ZONE WITH STRIPPING GAS FOR A PERIOD OF TIME OF AT LEAST ABOUT 30 SECONDS, PASSING STRIPPED PRODUCTS OF REACTION TO ABOVE THE DENSE BED OF CATALYST IN THE REACTION ZONE WITHOUT PASSING THERETHROUGH, AND THEREAFTER PASSING THE STRIPPED CATALYST SUBSTANTIALLY VERTICALLY DOWNWARDLY FROM THE BOTTOM OF THE STRIPPING ZONE AS AN ELONGATED CONFINED STREAM TO SUBSTANTIALLY THE BOTTOM OF THE FLUIDIZED BED OF CATALYST IN THE REGENERATION ZONE.