Fluidized coking of solid carbonaceous materials

Claim 1

A PROCESS FOR CONVERTING A CHARGE STOCK OF A SOLID CARBONACEOUS MATERIAL INTO MORE VOLATILE HYDROCARBONS AND COKE, COMPRISING INTRODUCING A STREAM OF FINELY DIVIDED PARTICLES OF CHARGE STOCK SUSPENDED IN A CARRIER GAS TANGENTIALLY INTO A FIRST REACTION ZONE CONTAINING A FIRST FLUIDIZED BED OF COKE PARTICLES ABOVE THE SURFACE OF THE FLUIDIZED BED, SAID FLUIDIZED BED COMPRISING COKE PARTICLES BETWEEN ABOUT 50 AND 1000 MICRONS IN DIAMETER AT A TEMPERATURE OF 900* TO 1600*F. MAINTAINED IN A TURBULENT, DENSE FLUIDIZED CONDITION BY ASCENDING FLUIDIZING GASES, PASSING VAPORS DISCHARGED FROM THE FIRST REACTION ZONE TO A SECOND REACTION ZONE CONTAINING A SECOND FLUIDIZED BED OF COKE PARTICLES MAINTAINED AT A TEMPERATURE OF 900* TO 1600* F., DELIVERING COKE PARTICLES FROM THE FIRST FLUIDIZED BED TO THE SECOND FLUIDIZED BED, DISCHARGING GASEOUS REACTION PRODUCTS FROM THE SECOND REACTION ZONE, DISCHARGING A STREAM OF COKE PARTICLES FROM THE SECOND REACTION ZONE, WITHDRAWING A SECOND STREAM OF COKE PARTICLES FROM THE SECOND FLUIDIZED BED AND TRANSFERRING THAM INTO A HEATER PASSING AN OXYGEN-CONTAINING GAS IN CONTACT WITH THE COKE PARTICLES IN THE HEATER TO BURN A PORTION OF THE COKE AND THEREBY HEAT THE PARTICLES, AND WITHDRAWING HOT COKE