Hydrocarbon conversion process

Claim 1

A HYDROCARBON CONVERSION PROCESS WHICH COMPRISES FORMING WITH HEATED PARTICULATE CARRIER A FLUIDIZED BED DIVIDED INTO A LOWER REGENERATION ZONE AND AN UPPER SECONDARY CONVERSION ZONE, WITHDRAWING CARRIER FROM SAID SECONDARY CONVERSION ZONE, CONTACTING A HEAVY HYDROCARBON OIL OF HIGH RAMSBOTTOM CARBON RESIDUE WITH THE WITHDRAWN CARRIER AND WITH A SUSPENDING GAS CONTAINING AT LEAST 20% BY VOLUME OF HYDROGEN AND PASSING THE RESULTING SUSPENSION OF SAID OIL AND CARRIER IN DILUTE PHASE UPWARDLY THROUGH AN ELONGATED PRIMARY CONVERSION ZONE MAINTAINED AT A TEMPERATURE IN THE RANGE OF ABOUT 800 TO 1050*F. AND A PRESSURE IN THE RANGE OF ABOUT 150 TO 1000 P. S. I. G. WHEREBY SAID OIL IS CONVERTED INTO VOLATIZED PRODUCTS AND A HYDROCARBONACEOUS DEPOSIT FOULING SAID CARRIER, PASSING FOULED CARRIER FROM SAID PRIMARY CONVERSION ZONE INTO SAID SECONDARY CONVERSION ZONE AND THEREIN CONVERTING SAID HYDROCARBONACEOUS DEPOSIT INTO COKE OF LOW HYDROGEN CONTENT BY CONTACT WITH HYDROGEN-CONTAINING REGENERATION PRODUCT GASES AT A TEMPERATURE ABOUT 50 TO 200*F. ABOVE THE TEMPERATURE OF SAID PRIMARY CONVERSION ZONE, WITHDRAWING SAID VOLATILIZED PRODUCTS FOR RECOVERY WHILE LIMITING THE CONTACT THEREOF WITH SAID FLUIDIZED BED TO NOT MORE THAN THE UPPER END PORTION OF SAID SECONDARY CONVERSION ZONE, REGENERATING CARRIER IN SAID REGENERATING ZONE BY REACTING THE COKE THEREON WITH STREAM AND OXYGEN AT A TEMPERATURE IN THE RANGE OF 1600 TO 2500*F. TO FORM SAID REGENERATION PRODUCT GASES, SEPA-