Conversion process and apparatus for use therein

Claim 1

A CONVERSION PROCESS WHICH COMPRISES PASSING A CHEMICAL REACTANT UPWARDLY THROUGH A FIRST REACTION ZONE IN CONTACT WITH A DILUTE SUSPENSION OF FINELY DIVIDED CATALYTIC MATERICAL, SEPARATING PRODUCTS OF REACTION FROM SAID DILUTE CATALYTIC SUSPENSION, PASSING CATALYTIC MATERIAL SEPARATED FROM THE FIRST REACTION ZONE TO A DENSE FLUIDIZED BED OF CATALYTIC MATERIAL IN A SECOND REACTION ZONE, SURROUNDING SAID FIRST REACTION ZONE, SAID FIRST AND SECOND REACTION ZONES BEING IN OPEN COMMUNICATION WITH ONE ANOTHER IN THE UPPER PORTION THEREOF, PASSING A CHEMICAL REACTANT UPWARDLY THROUGH THE DENSE FLUIDIZED BED OF CATALYTIC MATERIAL IN SAID SECOND REACTION ZONE, COMMINGLING PRODUCTS OF THE FIRST RECTION ZONE WITH THOSE OF THE SECOND REACTION ZONE ABOVE THE DENSE FLUIDIZED BED OF CATALYST IN THE SECOND REACTION ZONE, WITHDRAWING CATALYTIC MATERIAL FROM THE LOWER PORTION OF THE SECOND REACTION ZONE AND PASSING THE SAME UPWARDLY THROUGH A FIRST STRIPPING ZONE TO THE UPPER PORTION OF A SECOND STRIPPING ZONE WITHIN SAID SECOND REACTION ZONE, PASSING THE CATALYTIC MATERIAL DOWNWARDLY THROUGH SAID SECOND STRIPPING ZONE AS A RELATIVELY DENSE BED OF CATALYTIC MATERIAL, PASSING STRIPPED CATALYTIC MATERIAL FROM THE LOWER PORTION OF SAID SECOND STRIPPING ZONE TO A REGENERATION ZONE, PASSING REGENERATED CATALYST TO THE LOWER PORTION OF SAID FIRST REACTION ZONE AND RECOVERING REACTION PRODUCTS FROM THE UPPER PORTION OF SAID SECOND REACTION ZONE.