Fluidized solids process for contacting solids and vapors with the conveyance of the solids in dense phase suspension

Claim 1

A PROCESS FOR THE CATALYTIC CRACKING OF HYDROCARBON IN THE PRESENCE OF FINELY DIVIDED POWDERED CRACKING CATALYST WHICH COMPRISES ESTABLISHING A FIRST INDUCTION ZONE COMMUNICATING THROUGH A FIRST CONVEYANCE ZONE INTO A REACTION ZONE, ESTABLISING A FIRST TRANSFER ZONE COMMUNICATING SAID REACTION ZONE WITH A SECOND INDUCTION ZONE, ESTABLISHING A SECOND CONVEYANCE ZONE COMMUNICATING SAID SECOND INDUCTION ZONE WITH A REGENERATION ZONE, ESTABLISHING A SECOND TRANSFER ZONE COMMUNICATING SAID REGENERATION ZONE WITH SAID FIRST INDUCTION ZONE, PASSING REGENERATED POWDERED CATALYST FROM SAID REGENERATION ZONE THROUGH SAID SECOND TRANSFER ZONE AS A DENSE PHASE AERATED SUSPENSION TO SAID FIRST INDUCTION ZONE TO FORM AND MAINTAIN A COMPACT ACCUMULATION OF SOLIDS THEREIN SUMBERGING THE INLET OPENING OF SAID FIRST CONVEYANCE, INTRODUCING A FIRST CONVEYANCE FLUID INTO SAID FIRST INDUCTION ZONE ABOVE THE LEVEL OF SAID ACCUMULATION OF SOLIDS, FLOWING SAID CONVEYANCE FLUID THROUGH SAID FIRST CONVEYANCE ZONE AT A RATE SUFFICIENT TO CONVEY A MOVING MASS OF SUBSTANTIALLY COMPACT REGENERATED POWDERED CATALYST INTO SAID REACTION ZONE, APPLYING A COMPACTING FORCE AGAINST THE CATALYST ISSUING FROM SAID FIRST CONVEYANCE ZONE TO MAINTAIN SAID CATALYST THEREIN AT A BULK DENSITY SUBSTANTIALLY EQUAL TO THE STATIC BULK DENSITY OF SAID CATALYST WHEN AT REST AND UNAERATED, DISPERSING REGENERATED CATALYST ISSUING THERE INTO IN A VAPORIZED HYDROCARBON FRACTION FORMING A TURBULENT DENSE PHASE SUSPENSION OF SAID CATALYST IN SAID HYDROCARBON, REMOVING CRACKED HYDROCARBON GASES AND VAPORS FROM SAID REACTION ZONE SUBSTANTIALLY FREE OF SUSPENDED CATALYST, MAINTAINING HYDROCARBON CRACKING CONDITIONS OF PRESSURE AND TEMPERATURES WITHIN SAID REACTION ZONE, REMOVING SPENT POWDERED CATALYST FROM SAID REACTION ZONE THROUGH SAID FIRST TRANSFER ZONE TO SAID SECOND INDUCTION ZONE AS A DENSE AERATED SUSPENSION TO FORM AND MAINTAIN A SUBSTANTIALLY COMPACT ACCUMULATION OF SAID CATALYST THEREIN TO SUBMERGE THE INLET OPENING OF SAID SECOND CONVEYANCE ZONE, INTRODUCING A SECOND CONVEYANCE FLUID INTO SAID SECOND INDUCTION ZONE AT A POINT ABOVE THE LEVEL OF SAID ACCUMILATION OF SOLIDS THEREIN, FLOWING SAID SECOND CONVEYANCE FLUID THROUGH SAID SECOND CONVEYANCE ZONE AT A RATE SUFFICIENT TO CONVEY A MOVING MASS OF SUBSTANTIALLY COMPACT SPENT POWDERED CATALYST THERETHROUGH INTO SAID REGENERATION ZONE, APPLYING A COMPACTING FORCE TO THE STREAM OF CATALYST ISSUING FROM SAID SECOND CONVEYANCE ZONE TO MAINTAIN THE BULK OF DENSITY OF SAID CATALYST THEREIN SUBSTTANTIALLY EQUAL TO THE BULK DENSITY OF SAID CATALYST WHEN AT REST AND UNAERATED, DISPERSING THE THUS CONVEYED SPENT CATALYST IN SAID REGENERATION GASES TO FORM A TURBULENT DENSE PHASE SUSPENSION IN SAID REGENERATION ZONE, REMOVING REGENERATION GAS FROM SAID REGENERATION ZONE SUBSTANTIALLY FREE FROM SUSPENDED TO POWDERED CATALYST AND RECIRCULATING SAID POWDERED CATALYST FROM SAID REGENERATION ZONE TO SAID REACTION ZONE TO CONTACT FURTHER QUANTITIES OF SAID HYDROCARBON FRACTION.