Hydrotreating catalysts comprising a supported mixture of a sulfide of a promoter, metal, trivalent chromium and molybdenum or tungsten.

摘要

Supported, hydroprocessing catalysts comprising a sulfide of (i) trivalent chromium, (ii) Mo. W or mixture thereof and (iii) at least one metal selected from (a) Ni, Co, Mn, Cu, Zn, (b) a mixture thereof and (c) a mixture thereof with Fe. These catalysts are made by compositing a preselected quantity of support material with a precursor comprising a mixture of (i) hydrated oxide of trivalent chromium and (ii) a salt containing a thiometallate anion of Mo or W and a cation comprising at least one divalent promoter metal chelated by at least one, neutral, nitrogen-containing polydentate ligand and heating the composite in the presence of sulfur and hydrogen in an oxygen-free atmosphere. These catalysts have been found to be useful hydrotreating catalysts having nitrogen removal activity superior to that of commercial catalysts such as sulfided cobalt-molybdate on alumina.