HIGH ACTIVITY SLURRY CATALYST PROCESS

摘要

A high viscosity index lubricating oil is produced from heavy oils by using a high activity slurry catalyst process. The catalyst is produced by sulfiding aqueous Group VIB metal compounds to a dosage greater than 8 SCF hydrogen sulfide per pound of Group VIB metal. The Group VIB metal can be promoted with Group VIII metals to enhance its activity. High activity slurry catalysts for hydroprocessing heavy hydrocarbon oils are produced from Group VIB metal compounds by sulfiding an aqueous mixture of the metal compound with from greater than about 8 to about 14 SCF of hydrogen sulfide per pound of Group VIB metal. The hydroprocessing of heavy oils is improved by the use of a high activity slurry catalyst prepared by sulfiding an aqueous Group VIB metal compound with a gas containing hydrogen sulfide to a dosage greater than 8 SCF of hydrogen sulfide per pound of Group VIB metal. After introducing the slurry catalyst into the heavy oil, and subjecting the mixture to elevated temperatures and partial pressures of hydrogen, the mixture is treated in a fixed or ebullated bed of hydrodesulfurization/hydrodemetalation catalyst under hydroprocessing conditions.