Catalytic process for treating heavy oils
AssigneeChevron Research and Technology Company
InventorsJaime Lopez, Thomas P. Snyder, Byron G. Spars
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Abstract
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.
Claims24
A process for the hydroprocessing of heavy hydrocarbonaceous oil containing metal contaminants comprises introducing said oil, an active catalyst slurry and a hydrogen-containing gas at elevated temperature and pressure into a fixed or ebullating bed of hydrodesulfurization-hydrodemetalation catalyst at temperatures greater than about 700.degree. F.:
- wherein said active catalyst slurry is prepared by sulfiding an aqueous mixture of a Group VIB metal compound with a gas containing hydrogen sulfide to a dosage greater than 8 Standard Cubic Feet (SCF) of hydrogen sulfide per pound of Group VIB metal.
A process for the hydroprocessing of heavy hydrocarbonaceous oil containing metal contaminants comprises introducing said oil, an active catalyst slurry, porous contact particles, and a hydrogen-containing gas at elevated temperatures and pressures into in a fixed or ebullating bed of hydrodesulfurization-hydrodemetalation catalyst at temperatures greater than about 700.degree. F.:
- wherein said active catalyst slurry is prepared by sulfiding an aqueous mixture of a Group VIB metal compound with a gas containing hydrogen sulfide to a dosage greater than 8 Standard Cubic Feet (SCF) of hydrogen sulfide per pound of Group VIB metal.
A process for the hydroprocessing of heavy hydrocarbonaceous oil containing metal contaminants comprises:
- (a) contacting said oil in a first stage with an active catalyst slurry and hydrogen at an elevated temperature and for a time sufficient to achieve measurable cracking and form a product stream;
- and
- (b) in a second stage, contacting said product stream with hydrogen in a fixed or ebullating bed of hydrodesulfurization-hydrodemetalation catalyst at temperatures greater than about 700.degree. F.:
- wherein said active catalyst slurry is prepared by sulfiding an aqueous mixture of a Group VIB metal compound with a gas containing hydrogen sulfide to a dosage of from greater than about 8 Standard Cubic Feet (SCF) of hydrogen sulfide per pound of Group VIB metal.
Dependencies are inferred from the claim text.