Catalytic hydrocarbon conversion process with the use of a moving bed at different temperature levels

Claim 1

A PROCESS FOR THE CATALYST CRACKING OF HYDROCARBONS TO FORM A GASOLINE-CONTAINING PRODUCT, WHICH COMPRISES: MAINTAINING A DOWMWARDLY GRAVITATING, SUBSTANTIALLY COMPACT BED OF SOLID, GRANULAR ADSORPTIVE CATALYST WITHIN A CONFINED ZONE; SUPPLYING A STREAM OF COOL GRANULAR ADSORPTIVE CATALYST TO THE UPPER SECTION OF SAID BED AT AT TEMPERATURE WITHIN THE RANGE ABOUT 150* F. TO 450* F.; SUPPLYING A STREAM OF HOT GRANULAR ADSORPTIVE CATALYST AT A TEMPERATURE WITHIN THE RANGE ABOUT 900 TO 1200* F. TO AN INTERMEDIASTE LEVEL IN SAID BED IN SUFFICIENT QUANTITY THAT A SUBSTANTIAL PORTION OF SAID BED THEREBELOW IN MAINTAINED AT AN AVERAGE TEMPERATURE WITHIN THE RANGE OF ABOUT 700 TO 1000* F.; INTRODUCING HYDROCARBONS CHARGE INTO THE BED BELOW THE LEVEL OF HOT CATALYST SUPPLY AND PASSING THE CHARGE THROUGH THE BED TO EFFECT CRACKING THEREOF BELOW THE LEVEL OF HOT CATALYST SUPPLY; PASSING VAPORS RESULTING FROM THE CRACKING CONVERSION UPWARDLY THROUGH THE UPPER SECTION OF SAID BED ABOVE THE LEVEL OF HOT CATALYST SUPING OF THE VAPORS TO A POINT WHERE CONDENSTION OCCURS TO THE EXTENT THAT OF THE REMAINING UNCONDENSED VAPOR AT LEAST 75 PER CENT BOILS WITHIN THE GASOLINE BOILING RANGE AND BELOW; REMOVING A VAPOR PRODUCT, AT LEAST 75 PER CENT OF WHICH CONSISTS OF MATERIAL BOILING WITHIN THE GASOLINE RANGE AND BELOW, FROM THE UPPER SECTION OF SAID CONFINED AONE; CONTINUOUSLY REMOVING CATALYST FROM THE LOWER SECTION OF THE BED AS A MIXTURE OF CATALYST PARTICLES INITIALLY SUPPLIED TO THE UPPER SECTION OF THE BED AND CATALYST PARTICLES SUPPLIED AT THE INTERMEDIATE LEVEL IN THE BED; PASSING A PORTION OF THE CATALYST SO REMOVED TOI A CONFINED REGENERATION ZONE AND REGENERATING THE CATALYST THEREIN TO RECONDITION IT FOR RE-USE IN THE REACTION ZONE; RETURNING CATALYST FROM THE REGENERATION ZONE TO THE BED AS THE HOT CATALYST STREAM; PASSING A SECOND PORTION OF THE CATALYST REMOVED FROM THE BED INTO AND THROUGH A COOLING ZONE AND RETURNING SAID SECOND PORTION TO THE REACTION ZONE AS THE COOL CATALYST STREAM.