The instant invention is directed to the preparation of a catalyst composition suitable for the hydroconversion of heavy oils. The catalyst composition is prepared by a series of steps, involving mixing a Group VIB metal oxide particularly molybdenum oxide and aqueous ammonia to form an aqueous mixt
The instant invention is directed to the preparation of a catalyst composition suitable for the hydroconversion of heavy oils. The catalyst composition is prepared by a series of steps, involving mixing a Group VIB metal oxide particularly molybdenum oxide 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 and a second hydrocarbon oil having a lower viscosity than the first oil. An active catalyst composition is thereby formed.
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What is claimed is: 1. A catalyst composition suitable for the hydroconversion of heavy oils, which is prepared by: (a) mixing a molybdenum oxide and aqueous ammonia to form a molybdenum aqueous mixture; (b) sulfiding, in a first reaction zone, the aqueous mixture of step (a) with a gas comprising
What is claimed is: 1. A catalyst composition suitable for the hydroconversion of heavy oils, which is prepared by: (a) mixing a molybdenum oxide and aqueous ammonia to form a molybdenum aqueous 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 a first hydrocarbon oil having a viscosity of at least 2 cSt @ 212�� F. but less than about 12 cSt@ 212�� F. at a speed with range from 100 to 1600 RPM to form and maintain a homogenous slurry designated as Mixture X; (e) combining Mixture X with hydrogen gas and a second hydrocarbon oil in a second reaction zone, the second hydrocarbon oil having a boiling point in the range from 50�� F. to 300�� F. and having a lower viscosity that the first hydrocarbon oil and mixing at a speed in the range from 100 to 1600 RPM in order to maintain a homogenous slurry, thereby forming an active catalyst composition admixed with a gaseous hydrocarbon; and (f) recovering the active catalyst composition by separation from the gaseous hydrocarbon of step (e). 2. The catalyst composition of claim 1, wherein conditions in the first reaction zone comprise a temperature in the range from at least about 80�� F. to about 200�� F., and a pressure in the range from at least about 100 psig to about 3000 psig. 3. The catalyst composition of claim 2, wherein conditions in the first reaction zone comprise a temperature in the range from at least about 100�� F. to about 180�� F. and a pressure in the range from at least about 200 psig to about 1000 psig. 4. The catalyst composition of claim 3, wherein conditions in the first reaction zone comprise a temperature in the range from at least about 130�� F. to to about 160�� F., and a pressure in the range from at least about 300 psig to about 500 psig. 5. The catalyst composition of claim 1, wherein the first hydrocarbon oil viscosity ranges from at least about 2 cSt @ 212�� F. to about 15 cSt @ 212�� F. 6. The catalyst composition of claim 1, wherein the Group VIII metal compound of step (c) is selected from the group consisting of nickel sulfates and cobalt sulfates. 7. The catalyst composition of claim 6, in which the weight ratio of nickel or cobalt to molybdenum ranges from 1:100 to about 1:2. 8. The catalyst composition of claim 1, wherein the second hydrocarbon oil boils in the range from at least about 50�� F. to about 300�� F. 9. The catalyst composition of claim 8, wherein the second hydrocarbon oil boils in the range from at least about 75�� F. to about 250�� F. 10. The catalyst composition of claim 1, wherein the ratio of the volume of the second oil to the first oil is greater than 1. 11. The catalyst composition of claim 1, wherein the ratio of molybdenum to first hydrocarbon oil is less than 1.0. 12. The catalyst composition of claim 1, wherein the first hydrocarbon oil is a vacuum gas oil. 13. The catalyst composition of claim 1, wherein the second hydrocarbon oil possess a kinetic viscosity of less than 0.3 cSt at 212�� F. 14. The catalyst composition of claim 1, wherein the second hydrocarbon oil is a light naphtha. 15. The catalyst composition of claim 14, wherein the conditions of the second reaction zone comprise a temperature in the range from at least about 350�� F. to about 600�� F., and a pressure in the range from at least about 1000 psig to about 3500 psig. 16. The catalyst composition of claim 15, wherein the conditions of the second reaction zone comprise a temperature in the range from at least about 350�� F. to about 600�� F., and the pressure in the range from at least about 1500 psig to about 3000 psig. 17. The catalyst composition of claim 1, wherein the hydrocarbon comprises a mixture of the first hydrocarbon oil and the second hydrocarbon oil. 18. The catalyst composition of claim 1, which is recovered by means of a high pressure separator. 19. The catalyst composition of claim 1, which exists in an active and concentrated state. 20. The catalyst composition of claim 10, wherein the ratio of the volume of the second oil to the first oil is greater than 5. 21. The catalyst composition of claim 20, wherein the ratio of the volume of the second oil to the first oil is greater than 10. 22. The catalyst composition of claim 11 wherein the ratio of molybdenum oxide to first hydrocarbon oil is at least less than 0.5 23. The catalyst composition of claim 22 wherein the ratio of molybdenum oxide to first hydrocarbon oil is at least less than 0.1. 24. 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 compound aqueous 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, at high shear mode, high shear mode being defined as intense mixing, wherein solids are suspended completely off the vessel bottom, and slurry uniformly is supplied to at least one-third of the fluid batch height and is suitable for flurry draw-off at low exit-nozzle elevations, the slurry of step (c) with a first hydrocarbon oil having a viscosity of at least 2 cSt @ 212�� F. to form Mixture X; (e) combining Mixture X at high shear mode with hydrogen gas and a second hydrocarbon oil in a second reaction zone, the second hydrocarbon oil having a boiling point in the range from 50�� F. to 300�� F. and having a lower viscosity that the first hydrocarbon oil, thereby forming an active catalyst composition admixed with a gaseous hydrocarbon; and, (f) recovering the active catalyst composition by separation from the gaseous hydrocarbon of step (e). 25. The catalyst composition of claim 24, wherein high shear mode occurs, in the range from 100 RPM to 1600 RPM, high shear mode being defined as intense mixing, wherein solids are suspended completely off the vessel bottom, and slurry uniformly is supplied to at least one-third of the fluid batch height and is suitable for slurry draw-off at low exit-nozzle elevations.
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이 특허에 인용된 특허 (2)
Lopez Jaime (Benicia CA), High activity slurry catalyst.
Milam, Stanley Nemec; Reynolds, Michael Anthony; Wellington, Scott Lee; Ranganathan, Easwar Santhosh; Chan, Win Sim, Process for treating a hydrocarbon-containing feed.
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