Reduced ternary molybdenum and tungsten sulfides and hydroprocessing catalysis therewith

Hilsenbeck, Shane J; McCarley, Robert E; Schrader, Glenn L; Xie, Xiaobing

Title: Reduced ternary molybdenum and tungsten sulfides and hydroprocessing catalysis therewith

Patent · Fri Jan 01 00:00:00 EST 1999

OSTI ID:872156

Hilsenbeck, Shane J ^[1]; McCarley, Robert E ^[1]; Schrader, Glenn L ^[1]; Xie, Xiaobing ^[2]

Ames, IA
College Station, TX

New amorphous molybdenum/tungsten sulfides with the general formula M.sup.n+.sub.2x/n (L.sub.6 S.sub.8)S.sub.x, where L is molybdenum or tungsten and M is a ternary metal, has been developed. Characterization of these amorphous materials by chemical and spectroscopic methods (IR, Raman, PES) shows that the (M.sub.6 S.sub.8).sup.0 cluster units are present. Vacuum thermolysis of the amorphous Na.sub.2x (Mo.sub.6 S.sub.8)S.sub.x .multidot.yMeOH first produces poorly crystalline NaMo.sub.6 S.sub.8 by disproportionation at 800.degree. C. and well-crystallized NaMo.sub.6 S.sub.8 at .gtoreq. 900.degree. C. Ion-exchange of the sodium material in methanol with soluble M.sup.2+ and M.sup.3+ salts (M=Sn, Co, Ni, Pb, La, Ho) produces the M.sup.n+.sub.2x/n (Mo.sub.6 S.sub.8)S.sub.x .multidot.yMeOH compounds. Additionally, the new reduced ternary molybdenum sulfides with the general formula M.sup.n+.sub.2x/n Mo.sub.6 S.sub.8+x (MeOH).sub.y ›MMOS! (M=Sn, Co, Ni) is an effective hydrodesulfurization (HDS) catalyst both as-prepared and after a variety of pretreatment conditions. Under specified pretreatment conditions with flowing hydrogen gas, the SnMoS type catalyst can be stabilized, and while still amorphous, can be considered as "Chevrel phase-like" in that both contain Mo.sub.6 S.sub.8 cluster units. Furthermore, the small cation NiMoS and CoMoS type pretreated catalyst showed to be very active HDS catalysts with rates that exceeded the model unpromoted and cobalt-promoted MoS.sub.2 catalysts.

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Research Organization:: Ames Laboratory (AMES), Ames, IA; Iowa State Univ., Ames, IA (United States)

DOE Contract Number:: W-7405-ENG-82

Assignee:: United States of America as represented by United States (Washington, DC)

Patent Number(s):: US 5872073

Application Number:: 08/694,907

OSTI ID:: 872156

Country of Publication:: United States

Language:: English

References (20)

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Title: Reduced ternary molybdenum and tungsten sulfides and hydroprocessing catalysis therewith

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References (20)

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