Promoted molybdenum or tungsten sulphide catalysts.

摘要

This invention relates to a process for the preparation of promoted molybdenum or tungsten sulphide catalysts, the catalysts prepared by such process, and to the use of such catalysts for hydroprocessing processes, particularly hydrotreating. These catalysts are formed by treating molybdenum or tungsten sulphide-containing material (which may be supported) with a low valence promoter metal selected from transition metals particularly Fe, Co or Ni.