Hydrocarbon oil conversion process

Claim 1

A METHOD OF PROCESSING A HEAVY, AROMATIC PETROLEUM OIL, COMPRISING INJECTING THE PETROLEUM OIL CONTAINING HIGH BOILING REFRACTORY CONSTITUENTS NON-VAPORIZABLE WITHOUT THERMAL DEGRADATION INTO A FIRST FLUIDIZED COKING ZONE CONTAINING A DENSE TURBULENT BED OF FINELY DIVIDED COKE MAINTAINED AT A COKING TEMPERATURE IN THE RANGE OF 850* TO 1000*F. WHEREBY SAID OIL IS PYROLYTICALLY UPGRADED, DEPOSITING CARBONACEOUS RESIDUE ON SAID FINELY DIVIDED COKE AND EVOLVING CONSIDERABLE QUANTITIES OF RELATIVELY LIGHTER HYDROCARBON VAPORS, STRIPPING COKE OF ADHERING HYDROCARBONS BEFORE CIRCULATING SAID COKE FROM SAID COKING ZONE TO A HEATING ZONE, SEPARATING FROM THE EFFLUENT FROM SAID COKING ZONE PRODUCTS BOILING BELOW AN END BOILING POINT IN THE RANGE OF 500* TO 900*F., INJECTING THE AROMATIC-CONTAINING REMAINDER OF SAID EFFLUENT BOILING ABOVE SAID END BOILING POINT INTO A SECOND FLUIDIZED COKING ZONE CONTAINING A DENSE TURBULENT BED PARTICULATE COKE MAINTAINED AT A HIGHER COKING TEMPERATURE IN THE RANGE OF 1000* TO 1200*F. WHEREBY SAID REMAINDER IS PYROLYTICALLY UPGRADED, DEPOSITING CARBONACEOUS RESIDUE ON SAID PARTICULATE COKE AND EVOLVING FURTHER QUANTITIES OF RELATIVELY LIGHTER HYDROCARBON VAPORS SEPARATING FROM THE VAPORS ISSUING FROM SAID SECOND COKING ZONE FURTHER AMOUNTS OF PRODUCTS BOILING BELOW SAID END BOILING POINT AND A HEAVY TAR RESIDUE, SAID RESIDUE BEING COMPOSED PRIMARILY OF SAID HIGH BOILING REFRACTORY CONSTITUENTS, WITHDRAWING SAID SEPERATED HEAVY TAR RESIDUE FROM SAID SECOND COKING ZONE WITHOUT SUBJECTING IT TO FURTHER COKING REACTIONS, SAID FINELY-DIVIDED COKE BEING HEATED IN A COMMON FLUIDIZED HEATING ZONE FROM WHICH THE COKE IS CIRCULATED TO THE SECOND COKING ZONE AND THENCE TO THE FIRST COKING ZONE AND FROM THE FIRST ZONE BACK TO SAID HEATING ZONE TO MAINTAIN THE COKING TEMPERATURES.

Claim 2

A METHOD OF PROCESSING A HEAVY, AROMATIC PETROLEUM OIL, COMPRISING INJECTING THE PETROLEUM OIL CONTAINING HIGH BOILING REFRACTORY CONSTITUENTS NON-VAPORIZABLE WITHOUT THERMAL DEGRADATION INTO A FIRST FLUIDIZED COKING ZONE CONTAINING A DENSE TURBULENT BED OF FINELY DIVIDED COKE MAINTAINED AT A COKING TEMPERATURE IN THE RANGE OF 850* TO 1000*F. WHEREBY SAID OIL IS PYROLYTICALLY UPGRADED, DEPOSITING CARBONACEOUS RESIDUE ON SAID FINELY DIVIDED COKE AND EVOLVING CONSIDERABLE QUANTITIES OF RELATIVELY LIGHTER HYDROCARBON VAPORS, STRIPPING COKE OF ADHERING HYDROCARBONS BEFORE CIRCULATING SAID COKE FROM SAID COKING ZONE TO A HEATING ZONE, SEPARATING FROM THE EFFLUENT FROM SAID COKING ZONE PRODUCTS BOILING BELOW AN END BOILING POINT IN THE RANGE OF 500* TO 900*F., INJECTING THE AROMATIC-CONTAINING REMAINDER OF SAID EFFLUENT BOILING ABOVE SAID END BOILING POINT INTO A SECOND FLUIDIZED COKING ZONE CONTAINING A DENSE TURBULENT BED PARTICULATE COKE MAINTAINED AT A HIGHER COKING TEMPERATURE IN THE RANGE OF 1000* TO 1200*F. WHEREBY SAID REMAINDER IS PYROLYTICALLY UPGRADED, DEPOSITING CARBONACEOUS RESIDUE ON SAID PARTICULATE COKE AND EVOLVING FURTHER QUANTITIES OF RELATIVELY LIGHTER HYDROCARBON VAPORS SEPARATING FROM THE VAPORS ISSUING FROM SAID SECOND COKING ZONE FURTHER AMOUNTS OF PRODUCTS BOILING BELOW SAID END BOILING POINT AND A HEAVY TAR RESIDUE, SAID RESIDUE BEING COMPOSED PRIMARILY OF SAID HIGH BOILING REFRACTORY CONSTITUENTS, WITHDRAWING SAID SEPERATED HEAVY TAR RESIDUE FROM SAID SECOND COKING ZONE WITHOUT SUBJECTING IT TO FURTHER COKING REACTIONS, SAID FINELY-DIVIDED COKE BEING HEATED IN A COMMON FLUIDIZED HEATING ZONE FROM WHICH THE COKE IS CIRCULATED TO THE SECOND COKING ZONE AND THENCE TO THE FIRST COKING ZONE AND FROM THE FIRST ZONE BACK TO SAID HEATING ZONE TO MAINTAIN THE COKING TEMPERATURES.