Patent ID: 8637419

Claim:
A hydroprocessing catalyst comprising at least one metal deposited on a catalyst support, the hydroprocessing catalyst made by a method comprising the steps of: (a) forming an extrudable mass containing the catalyst support, (b) extruding the mass to form a shaped extrudate, (c) calcining the mass to form a calcined extrudate, (d) preparing an impregnation solution containing at least one metal nitrate, a modifying agent and an ammonium containing component, and adjusting the pH of the impregnation solution to between 1 and 5.5 with a hydroxide base, inclusive, (e) contacting the shaped extrudate with the impregnation solution, and (f) drying the impregnated extrudate at a temperature sufficient to remove the impregnation solution solvent, to form a dried impregnated extrudate.