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US 8,530,373 B2Granted
Catalyst and process for the manufacture of ultra-low sulfur distillate product
AssigneeShell Oil Company
InventorOpinder Kishan Bhan
Life of this patent
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Abstract
Described is a catalyst and process useful in the hydrodesulfurization of a distillate feedstock to manufacture a low-sulfur distillate product. The catalyst comprises a calcined mixture of inorganic oxide material, a high concentration of a molybdenum component, and a high concentration of a Group VIII metal component. The mixture that is calcined to form the calcined mixture comprises molybdenum trioxide, a Group VIII metal compound, and an inorganic oxide material. The catalyst is made by mixing the aforementioned starting materials and forming therefrom an agglomerate that is calcined to yield the calcined mixture that may be used as the catalyst or catalyst precursor.
Claims35
A composition for use as a distillate hydrodesulfurization catalyst in the manufacture of an ultra-low sulfur distillate product, wherein said composition comprises:
- a calcined mixture made by calcining a co-mulled mixture comprising an inorganic oxide material, molybdenum trioxide in the form of finely defined particles having a maximum dimension of less than 150 mm, and a Group VIII metal compound selected from the group consisting of a nickel compound and a cobalt compound, wherein said calcined mixture has a molybdenum content in the range of from 10 weight percent to 22 weight percent with the weight percent being based upon the molybdenum as metal and the total weight of said calcined mixture, and a Group VIII metal content in the range of from 3 weight percent to 12 weight percent with the weight percent being based upon the Group VIII metal in its elemental form and the total weight of said calcined mixture, wherein said calcined mixture has a pore structure that includes a pore size distribution for said calcined mixture such that at least 70% of the total pore volume of said calcined mixture is in the pores of said calcined mixture having a diameter in the range of from 70 A to 150 A, wherein said calcined mixture has a mean pore diameter in the range of from 50 angstroms to 100 angstroms, and wherein said calcined mixture has less than 1 percent of the total pore volume in macropores having a pore diameter greater than 1000 angstroms, said calcined mixture being further characterized by having said molybdenum content and Group VIII metal content substantially uniformly dispersed within said inorganic oxide material, wherein crushed fines of a fresh, promoted, tri-metallic hydrotreatinq catalyst are mixed by co-mullinq with said inorganic oxide material and said finely divided particles of molybdenum trioxide prior to calcination of said co-mulled mixture.
A composition for use as a distillate hydrodesulfurization catalyst in the manufacture of an ultra-low sulfur distillate product, wherein said composition comprises:
- a calcined mixture made by calcining a mixture comprising a substantial absence of a molybdenum compound that is in a form other than molybdenum trioxide and further comprising a co-mulled mixture of an inorganic oxide material, molybdenum trioxide in the form of finely defined particles having a maximum dimension of less than 150 μm, and a Group VIII metal compound selected from the group consisting of a nickel compound and a cobalt compound, wherein said calcined mixture has a molybdenum content in the range of from 10 weight percent to 22 weight percent with the weight percent being based upon the molybdenum as metal and the total weight of said calcined mixture, and a Group VIII metal content in the range of from 3 weight percent to 12 weight percent with the weight percent being based upon the Group VIII metal in its elemental form and the total weight of said calcined mixture, wherein said calcined mixture has a pore structure that includes a pore size distribution for said calcined mixture such that at least 70% of the total pore volume of said calcined mixture is in the pores of said calcined mixture having a diameter in the range of from 70 A to 150 A, wherein said calcined mixture has a mean pore diameter in the range of from 50 angstroms to 100 angstroms, and wherein said calcined mixture has less than 1 percent of the total pore volume in macropores having a pore diameter greater than 1000 angstroms, said calcined mixture being further characterized by having said molybdenum content and Group VIII metal content substantially uniformly dispersed within said inorganic oxide material, wherein crushed fines of a fresh, promoted, tri-metallic hydrotreating catalyst are mixed by co-mulling with said inorganic oxide material and said finely divided particles of molybdenum trioxide prior to calcination of said co-mulled mixture.
A composition for use as a distillate hydrodesulfurization catalyst in the manufacture of an ultra-low sulfur distillate product, wherein said composition comprises:
- a calcined mixture made by calcining a co-mulled mixture consisting essentially of a solid inorganic oxide starting material, molybdenum trioxide in the form of finely defined particles having a maximum dimension of less than 150 μm, and a Group VIII metal compound selected from the group consisting of a nickel compound and a cobalt compound, wherein said calcined mixture has a molybdenum content in the range of from 10 weight percent to 22 weight percent with the weight percent being based upon the molybdenum as metal and the total weight of said calcined mixture, and a Group VIII metal content in the range of from 3 weight percent to 12 weight percent with the weight percent being based upon the Group VIII metal in its elemental form and the total weight of said calcined mixture, wherein said calcined mixture has a pore structure that includes a pore size distribution for said calcined mixture such that at least 70% of the total pore volume of said calcined mixture is in the pores of said calcined mixture having a diameter in the range of from 70 A to 150 A, wherein said calcined mixture has a mean pore diameter in the range of from 50 angstroms to 100 angstroms, and wherein said calcined mixture has less than 1 percent of the total pore volume in macropores having a pore diameter greater than 1000 angstroms, said calcined mixture being further characterized by having said molybdenum content and Group VIII metal content substantially uniformly dispersed in said inorganic oxide material, wherein crushed fines of a fresh, promoted, tri-metallic hydrotreating catalyst are mixed by co-mulling with said inorganic oxide material and said finely divided particles of molybdenum trioxide prior to calcination of said co-mulled mixture.
Dependencies are inferred from the claim text.