Catalyst and process for the manufacture of ultra-low sulfur distillate product
AssigneeShell Oil Company
InventorOpinder Kishan Bhan
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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.
Claims39
A process for making an ultra-low sulfur distillate product, wherein said process comprises:
- contacting, under suitable distillate desulfurization process conditions, a distillate feedstock, wherein said distillate feedstock comprises a first sulfur concentration, with a distillate hydrodesulfurization catalyst comprising a calcined mixture made by calcining a formed particle of a mixture consisting essentially of molybdenum trioxide, a nickel compound, and an inorganic oxide material, wherein said distillate hydrodesulfurization catalyst comprises from 7 to 22 weight percent molybdenum, as metal and based on the total weight of said distillate hydrodesulfurization catalyst, and more than 3 weight percent nickel, as metal and based on the total weight of said distillate hydrodesulfurization catalyst, and 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 angstroms to 150 angstroms;
- and yielding said ultra-low sulfur distillate product having a second sulfur concentration.
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 consisting essentially of an inorganic oxide material, molybdenum trioxide, 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 7 weight percent to 22 weight percent with the weight percent being based upon the molybdenum as metal and the total weight of the 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 the calcined mixture, and 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 angstroms to 150 angstroms.
A method of making a composition for use as a distillate hydrodesulfurization catalyst in the manufacture of an ultra-low sulfur distillate product, wherein said method comprises:
- co-mulling an inorganic material, molybdenum trioxide, and a nickel compound to form a mixture that consists essentially of molybdenum trioxide, inorganic material and a nickel compound;
- forming said mixture into a particle;
- and
- calcining said particle to provide a calcined mixture, wherein said calcined mixture has a molybdenum content in the range of from 7 weight percent to 22 weight percent with the weight percent being based upon the molybdenum as metal and the total weight of the 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 the calcined mixture, and 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 angstroms to 150 angstroms.
Dependencies are inferred from the claim text.