Single vessel coking process

Claim 1

THE PROCESS OF CONVERTING HYDROCARBON OILS TO PRODUCE LOWER BOILING PRODUCTS, WHICH COMPRISES ESTABLISHING A MASS OF COKE PARTICLES IN A REACTION ZONE OF REDUCED CROSS-SECTION AT THE BOTTOM, SAID REDUCED AND ENLARGED IN A REGION ABOVE THE BOTTOM, SAID REDUCED AND ENLARGED CROSS-SECTION BEING IN OPEN FIELD COMMUNICATION WITH EACH OTHER, INTRODUCING AIR INTO THE COKE PARTICLES IN THE BOTTOM REGION AT A VELOCITY IN THE RANGE OF ABOUT 3 TO 7 FT/SEC TO FLUIDIZE THE PORTION OF REDUCED CROSSSECTION VIGOROUSLY, TO HEAT SAID COKE SUBSTANTIALLY AND CAUSE IT TO FLUIDIZE LESS VIGOROUSLY FLUIDIZED UPPER PORTION SECTIONAL PORTION, INTRODUCING THE HYDROCARBON OIL FEED DIRECTLY INTO THE LESS VIGOROUSLY IN THE LARGER CROSSOF THE MASS, TO CONVERT SAID FEED TO LOWER BOILING PRODUTCTS AND COKE, WITHDRAWING THE PRODUCT COKE FROM THE LESS ACTIVELY FLUIDIZED ZONE, INTRODUCING A STREAM OF WATER COUNTERCURRENTLY TO THE WITHDRAWN COKE T COOL SAID COKE AND TO FROM A STREAM OF STRIPPING STREAM FOR STRIPPING HYDROCARBON VAPORS FROM THE WITHDRAWN COKE, AND INJECTING THE STRIPPING STEAM AND STRIPPED HYDROCARBON VAPORS INTO THE LESS ACTIVELY FLUIDIZED BED TO PROVIDE ADDITONAL FLUIDIZING VAPORS.