DISPERSED METAL SULFIDE CATALYSTS FOR HYDROPROCESSING

摘要

The present invention is directed toward a catalyst composition comprising a catalyst prepared by a process comprising: (a) impregnating an oxide precursor selected from the group consisting of rare earth oxide precursors, yttria precursors and mixtures thereof, onto an inorganic refractory oxide support; (b) drying said support at a temperature of about 100 to about 120 DEG C followed by calcining said support at a temperature of about 400 to about 600 DEG C; and (c) compositing or depositing on said support of step (b), a catalyst precursor salt represented by (ML)(MoyW1-yO4)a wherein M comprises Cr and/or one or more divalent promoter metals selected from the group consisting of Mn, Fe, Co, Ni, Cu, Zn and mixtures thereof, wherein y is any value ranging from 0 to 1, and wherein L is one or more neutral, nitrogen-containing ligands at least one of which is a chelating polydentate ligand; a = 1 when chromium is not one of the promoter metals and 0.5