Method for making a hydroprocessing catalyst
AssigneeChevron U.S.A. Inc.
InventorBi-Zeng ZHAN
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Abstract
The present invention is directed to a method for making a catalyst for hydroprocessing a carbonaceous feedstock under hydroprocessing conditions, and the use of that catalyst. More particularly, the present invention is directed to methods for inhibiting rapid decomposition of ammonium nitrate during calcination of the catalyst following metal impregnation, wherein ammonium nitrate is formed when a nitrate-containing composition and an ammonium-containing component is used in the deposition of metal onto the catalyst.
Claims13
A method for hydroprocessing a carbonaceous feedstock, comprising contacting the carbonaceous feedstock with a sulfided hydroprocessing catalyst and hydrogen under hydroprocesssing conditions, the hydroprocessing catalyst comprising at least one metal deposited on a catalyst support, wherein deposition of the metal is achieved using an impregnation solution comprising a nitrate of the at least one metal, which impregnation solution has a pH between 1 and 5.5, inclusive.
Dependencies are inferred from the claim text.