Fluid coking using extraneous seed coke

Claim 1

IN A COKING PROCESS FOR FORMING LARGER COKE PRTICLES FROM SMALLER SEED COKE PARTICLES WHICH INCLUDES THE STEPS OF (A) FLUIDIZING AND FORMING A BED OF PARTICLES COKE WITHIN A HIGH TEMPERATURE REACTION ZONE, (B) WITHDRAWING PARTICULATE COKE FROM SAID REACTION ZONE AND PASSING SAME THROUGH A HEATING ZONE TO ELEVATE THE TEMPERATURE OF THE COKE, THENCE RETURNING THE HEATED COKE TO THE REACTION ZONE TO SUPPLY PROCESS HEAT WHILE MAINTAINING THE FLUIDIZED BED AT A TEMPERATURE OF AT LEAST ABOUT 1800*F., (C) CONTACTING THE PARTICULATE COKE SOLIDS OF THE BED WITH A HYDROCARBON TO FORM A GASEOUS EFFLUENT AND TO DEPOSIT COKE ON THE COKE SOLIDS PARTICLES, AND (D) WITHDRAWING PARTICULATE COKE FROM THE FLUIDIZED BED OF THE REACTION ZONE AS PRODUCT, THE IMPROVEMENT COMPRISING (E) TRANSFERRING FROM AN EXTRANEOUS PROCESS TO THE FLUIDIZED BED OF THE REACTION ZONE A LOW TEMPERATURE SEED COKE FORMED AT TEMPERATURES RANGING FROM ABOUT 900*F. TO ABOUT 1400*F. SAID COKE SEEDS BEING OF PARTICLE SIZE RANGING FROM ABOUT 325 MESH TO ABOUT 40MESH.