Patent ID: 7803735

Claim:
A process for forming catalyst composition prepared from an unsupported catalyst precursor composition having a formula A v [(M P )(OH) x (L) n y ] z (M VIB O 4 ), the process comprises: co-precipitating at reaction conditions to form a precipitate or cogel-precursor: at least one of a Group VIB metal compound M VIB , at least a metal compound M P selected from Group VIII, Group IIB, Group IIA, Group IVA and combinations thereof, and at least one of an organic oxygen-containing ligand; wherein the precursor has 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 selected from Group VIII, Group IIB, Group IIA, Group IVA and combinations thereof, P is oxidation state of M P with P having a value of +2 or +4 depending on the selection of M P , a L is at least one organic oxygen-containing ligand, is at least a Group VIB metal, M P :M VIB has an atomic ratio of 100:1 to 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; perform a solid-liquid separation to collect the catalyst precursor; and contacting the catalyst precursor with hydrogen and a sulfur containing compound to sulfidate the catalyst precursor.