Patent ID: 8206575

Claim:
A process for hydroprocessing a hydrocarbon feedstock which comprises contacting the feedstock with an unsupported catalyst under hydroprocessing conditions, wherein the catalyst is prepared by drying at a temperature of 200° C. or less, then sulfidizing an unsupported charge-neutral hydroxide catalyst precursor composition of the formula: A v [(M P )(OH) x (L) n y ] z (M VIB O 4 ), wherein A is at least one of an alkali metal cation, an ammonium, an organic ammonium and a phosphonium cation, M P is at least one of a Group VIII metal, Group IIB metal, Group IIA metal, Group IVA metal and combinations thereof, P is oxidation state with M P having an oxidation state of +2 or +4 depending on the selection of M P , M VIB is at least a Group VIB metal having an oxidation state of +6, L is at least one oxygen-containing ligands, and L has a neutral or negative charge n<=0; M P :M VIB has an atomic ratio between 100:1 and 1:100; v−2+P*z−x*z+n*y*z=0; and 0<y≦−P/n; 0<x≦P; 0<v≦2; 0<z; wherein the hydroxide catalyst precursor has an X-ray diffraction pattern which is amorphous with broad peaks or an X-ray diffraction pattern with at least a crystalline peak at Bragg angle between 52.7° to 53.2° theta.