Process for the catalytic desulfurization of hydrocarbon oils

Claim 1

THE METHOD FOR DESUFLURIZING A HYDROCARBON OIL BOILING ABOVE THE GASOLINE BOILING RANGE AND HAVING ORGANICALLY BOUND SULFUR IMPURITIES WHICH COMPRISES ADDING TO THE OIL TO BE DESULFURIZED A LOWER BOILING STRAIGHT RUN FRACTION OF A NAPHTHENIC PETROLEUM IN AN AMOUNT SUFFICIENT TO REDUCE THE CRITICAL TEMPERATURE OF THE RESULTING MIXTURE TO AT LEAST 20* C. BELOW THE OPERATING TEMPERATURE, THEN CONTACTING THE RESULTING MIXTURE IN THE ABSENCE OF ADDED GAS WITH A SULFACTIVE HYDROGENATION CATALYST AT A TEMPERATURE AT LEAST 20* C. ABOVE THE CRITICAL TEMPERATURE OF THE MIXTURE AND BETWEEN 375* C. AND 425* C. WHILE COMPRESSED TO A DENSITY OF AT LEAST 0.25 G./CC., AND THEN SEPARATING THE SAID LOWER BOILING FRACTION FROM THE DESULFURIZED HYDROCARBON OIL.