Method for charging high-boiling hydrocarbons to fluid catalytic conversion processes

Claim 1

IN A FLUIDIZED PROCESS FOR THE CONVERSION OF HEAVY HYDROCARBON OILS CONTAINING RESIDUAL FRACTIONS HAVING BOILING POINTS ABOVE THE CONVERSION TEMPERATURES IN WHCIH A DENSE PHASE FLUIDIZED STREAM OF HOT, FINELY DIVIDED PARTICLES IS WITHDRAWN FROM A FLUIDIZED BED IN A RACTION VESSEL. PASSED DOWNWARDLY THROUGH A STANDPIE HAVING A SLIDE VALVE THERIN FOR CONTROL OF THE RATE OF WITHDRAWAL, DISCHARGED INTO A TRANSFER LINE BELOW THE SLIDE VALVE, THE HEAVY HYDROCARBON OIL IS INTRODUCED INTO THE STREAM OF HOT PARTICLES IN THE TRASFER LINE, AND A DISPERSED, DILUTE PHASE OF THE MIXTURE OF HYDROCARBON OIL AND FINELY DIVIDED PARTICLES IS DELIVERED UPWARDLY THROUGH THE TRANSFER LINE TO A FLUIDIZED BED IN AS A REACTOR, THE IMPROVEMENT COMPRISING INJECTING INTO THE DENSE PHASE STREAM OF FINELY DIVIDED PARTICLES DISCHARGED INTO THE TRANSFER LINE PRIOR TO INTRODUCTION OF THE HYDROCARBON OIL A GAS SUBSTANTIALLY INERT TO THE CONDITIONS IN THE REACTOR TO DISPERSE THE PARTICLES IN A DILUTE PHASE AND CARRY THEM AT A HIGH VELOCITY TOWARD THE REACTOR PAST THE POINT OF INTRODUCTION OF THE HEAVY HYDROCARBON OILS