Highly active slurry catalyst composition
AssigneeChevron U.S.A. Inc.
InventorsKaidong Chen, Bruce E. Reynolds
Life of this patent
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Abstract
The instant invention is directed to the preparation of a slurry catalyst composition. The slurry catalyst composition is prepared in a series of steps, involving mixing a Group VIB metal oxide, particularly molybdenum and aqueous ammonia to form an aqueous mixture and sulfiding the mixture to form a slurry. The slurry is then promoted with a Group VIII metal. Subsequent steps involve mixing the slurry with a hydrocarbon oil, and combining the resulting mixture with hydrogen gas (under conditions which maintain the water in a liquid phase) to produce the active slurry catalyst.
Claims16
A catalyst composition suitable for the hydroconversion of heavy oils, which is prepared by:
- (a) mixing molybdenum oxide and aqueous ammonia to form a molybdenum mixture;
- (b) sulfiding, in a first reaction zone, the aqueous mixture of step (a) with a gas comprising hydrogen sulfide to a dosage greater than 8 SCF of hydrogen sulfide per pound of molybdenum to form a slurry;
- (c) promoting the slurry with a Group VIII metal compound;
- (d) mixing the slurry of step (c) with hydrocarbon oil having a viscosity of at least 2 cSt @ 212° F. but less than about 15 cSt @ 212° F. at in the range from 100 to 1600 RPM to form and maintain a homogenous slurry designated as Mixture X;
- (e) combining Mixture X with hydrogen gas in a second reaction zone, under conditions which maintain the water in Mixture X in a liquid phase, and mixing at a speed in the range from 100 to 1600 RPM in order to maintain as homogenous slurry thereby forming an active catalyst composition admixed with a liquid hydrocarbon;
- and
- (f) recovering the active catalyst composition.
Dependencies are inferred from the claim text.