Fluid bed process for coking hydrocarbons

Claim 1

A HIGH TEMPERATURE FLUID COKING PROCESS COMPRISING INJECTING A HYDROCARBON FEED INTO A FLUIDIZED BED OF COKE PARTICLES IN A REACTOR MAINTAINED AT A TEMPERATURE OF 1950-2300*F. BY CIRCULATING PART OF THE PRODUCT COKE TO A VESSEL WHEREIN THE COKE IS HEATED TO A TEMPERATURE 200 TO 400*F. ABOVE THE TEMPERATURE IN SAID REACTOR AND RETURNING THE THUS HEATED COKE TO THE COLING REACTOR TO PROVIDE THE ENDOTHERMIC HEAT ADDED TO CARRY OUT THE COKING REACTION AS SENSIBLE HEAT OF THE CIRCULATED COKE, WHEREBY THE INJECTED HYDROCARBIN FEED IN CRACKED ESSENTIALLY TO HYDROGEN AND COKE, SAID FEED BEING INTRODUCED AT A SUFFICIENT RATE TO MAINTAIN THE AVERAGE SUPERFICIAL LINEAR GAS VELOCITY OF THE EVOLVED GASES AT ABOUT 0.2-0.5 FT./SEC. AND AT A RATE TO CONTROL THE PRODUCTION OF SOOTLIKE MATERIAL TO LESS THAN ABOUT 5%, THE THUS PRODUCED COKE DEPOSITING IN LAYERS ON THE COKE PARTICLES GRADUALLY INCREASING THEM IN SIZE, RECOVERING THE HIGH TEMPERATURE FLUID COKE, GRINDING PART OF THE COKE TO MAKE SEED COKE AND RECYCLING THE SEED COKE TO THE REACTOR.