Increasing VI of lube oil by hydrotreating using bulk Ni/Mn/Mo or Ni/Cr/Mo sulfide catalysts prepared from ligated metal complexes
AssigneeExxon Research & Engineering Co.
InventorsDonald T. Eadie, Michael A. Fefer
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Abstract
Lube oils of increased VI are prepared by hydrotreating using bulk Ni/Mn/No or Cr/Ni/Mo sulfide catalysts prepared from ligated, e.g., ethylene diamine, metal complexes. In particular the Ni/Mn/Mo sulfide catalyst is prepared from the oxide, precursor with subsequent sulfiding while the Cr/Ni/Mo sulfide catalyst is prepared from the sulfide precursor in the presence of H.sub.2 S/H.sub.2.
Claims4
A method for increasing the Viscosity Index of lubricating and specialty oils by contacting with a catalyst, said method comprising contacting a lube and/or specialty oil stock under hydrotreating conditions with a specific bulk metal sulfide hydrotreating catalyst selected from the group consisting of bulk Cr/Ni/Mo sulfide catalyst, bulk Ni/Mo/Mn sulfide catalyst and mixtures thereof, wherein the Cr/Ni/Mo sulfide catalyst is prepared by the decomposition in a sulfide containing atmosphere at a temperature of at least 150.degree. C. of a [Ni(L).sub.3 ](Cr(L).sub.3)-[MoS.sub.4 ].sub.2-2.5 precursor complexes and the Ni/Mo/Mn sulfide catalyst is prepared by the decomposition in inert atmosphere at 300.degree.-400.degree. C. followed by sulfiding using H.sub.2 S/H.sub.2 at 200.degree.-600.degree. C. of a [Ni(L).sub.3 ](Mn(L).sub.3)[MoO.sub.4 ].sub.2 precursor complex where L is one or more neutral, nitrogen containing ligand, at least one of which is a chelating polydentate ligand.
Dependencies are inferred from the claim text.