High temperature short time hydrocarbon conversion process

Claim 1

IN A HYDROCARBON CONVERSION PROCESS WHEREIN A HEAVY, HYDROCARBON FEED IS CONTACTED WITH A STREAM OF HIGH TEMPERATURE PARTICULATE SOLISA FLOWING UPWARDLY THROUGH AN ELONGATED REACTION ZONE AND CONVERTED TO COKE WHICH DEPOSITED ON SAID PARTICULATE SOLIDS AND TO LIGHT CONVERSION PRODUCTS, THE IMPROVEMENT WHICH COMPRISES MIXING A HEAVY HYDROCARBON FEED WITH HOT UPFLOWING PARTICULATE SOLIDS IN A VAPORIZATION ZONE FORMING THE INITIAL PORTION OF SAID ELONGATED REACTION ZONE AT A TEMPERATURE IN THE RANGE OF ABOUT 1000* F, TO 1200* F, TO VAPORIZE THE HEAVY HYDROCARBON FEED, UPWARDLY FLOWING THE RESULTING MIXTURE OF VAPORS AND SOLIDS RAPIDLY THROUGH SAID VAPORIZATION ZONE, IMPARTING A STRONG ROTATIONAL MOTION TO SAID MIXTURE ABOUT THE AXIS OF FLOW AT THE OUTLET END ONLY OF SAID VAPORIZATION ZONE SO THAT THE GAS HAS A SUPERFICIAL VELOCITY IN THE RANGE OF ABOUT 1.5 TO 100 FEET PER SECOND TO EFFECT SEPARATION OF SOLIDS AT THE OUTLET END OF SAID VAPORIZATION ZONE, REMOVING AND SEPARATED SOLIDS, PASSING SAID UPWARDLY MOVING AND RATATING VAPORS TO A CRACKING ZOZNE ARRANGED IMMEDIATELY ABOVE SAID VAPORIZATION ZONE, IMMEDIATELY THEREAFTER INTRODUCING ONLY INTO THE CENTRAL PORTION OF SAID CRACKING ZONE ADDITIONAL HOTTER PARTICULATE SOLIDS AS A CONICAL CURTAIN SO THAT SAID UPWARDLY MOVING AND RATATING VAPORS FROM SAID VAPORIZATION ZONE PASS INTO SAID CRACKING ZONE THROUGH SAID CONICAL CURTAIN OF SOLIDS AND ARE RAPIDLY HEATED THEREBY, SAID ADDITIONAL HOTTER SOLIDS BEING ADDED IN AN AMOUNT SUFFICIENT TO RAISE THE TEMPERATURE OF SAID VAPORS TO A CRACKING TEMPERATURE WITHIN THE RANGE OF ABOUT 1250* F, TO 1800* F, IN SAID CRACKING ZONE, SAID HOTTER PARTICULATE SOLIDS SO INTRODUCED BEING MOVED BY THE CENTRIFUGAL ACTION OF SAID VAPORS IN A RATATING CONICAL PATTERN TO THE PERIPHERY OF SAID CRACKING ZONE BECAUSE OF A STRONG ROTATIONAL MOTION WHEREBY A VAPOR RESIDENCE TIME IN THE RANGE OF 0.01 TO 1.0 SECOND IS OBTAINED IN SAID CRACKING ZONE, THEN SEPARATING THE LAST-MENTIONED PARTICULATE SOLIDS FROM THE VAPORS AT THE OUTLET OF SAID CRACKING ZONE, REMOVING SAID LAST-MENTIONED VAPORS UPWARDLY, INJECTING A QUENCH LIQUID INTO SAID LAST-MENTIONED VAPORS TO LOWER THE TEMPERATURE THEREOF TO BELOW ABOUT 1000* F, AND RECOVERING THE VAPORS SO QUENCHED.