Arsenic removal catalyst and method for making same
AssigneeShell Oil Company
InventorOpinder Kishan Bhan
Life of this patent
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Abstract
A catalyst for removing arsenic from petroleum feedstocks comprising a porous refractory support impregnated with at least 8 wt. % of a Group VIB metal and an amount of Group VIII metal such that the atomic ratio of Group VIII metal to Group VIB metal is between about 1.5 and 2.5. A method of making such catalyst and a process for removing arsenic metals from a petroleum fraction using said catalyst.
Claims20
A catalyst for removing arsenic from a petroleum fraction comprising a porous refractory support, at least 8 wt. % of a Group VIB metal selected from molybdenum and tungsten and an amount of a Group VIII metal selected from nickel and cobalt sufficient to result in an atomic ratio of the Group VIII metal to the Group VIB metal of between 1.5 and 2.5.
A process for making a catalyst for removing arsenic from petroleum fractions comprising:
- a) impregnating a porous support with sufficient amount of a solution of a Group VIII metal compound selected from nickel and cobalt compounds such that the impregnated support comprises at least 8 wt. % Group VIII metal calculated as the metal;
- b) drying the impregnated support of step (a) and then calcining at a temperature of at least 427° C.;
- c) impregnating the product of step (b) with a solution comprising a Group VIB compound selected from molybdenum and tungsten compounds and, optionally, an additional amount of the Group VIII compound deposited in step (a), wherein the amount of Group VIB compound is such that the atomic ratio of all the Group VIII metal impregnated to the amount of Group VIB metal impregnated is between 1.5 and 2.5;
- and
- d) drying and calcining the product of step (c), wherein said calcining is done at a temperature at least 30° C. lower than the calcining performed in step (b).
Dependencies are inferred from the claim text.