Claims
- 1. A catalyst composition of the formula ML(Mo.sub.y W.sub.1-y O.sub.b).sub.a wherein M is Cr and/or one or more divalent promoter metals selected from the group consisting of Mn, Fe, Co, Ni, Cu and Zn, L is one or more neutral nitrogen containing ligands at least one of which is a chelating polydentate ligand, 0.ltoreq.y.ltoreq.1, for non-chromium containing catalysts a=1, for chromium containing catalysts 0.5.ltoreq.a.ltoreq.3, and b<4.
- 2. An aromatics hydrogenation process, comprising: contacting a mixed metal oxide catalyst having the formula
- ML(Mo.sub.y W.sub.1-y O.sub.b).sub.a
- wherein M is Cr and/or one or more divalent promoter metals selected from the group consisting of Mn, Fe, Co, Ni, Cu and Zn, L is one or more neutral nitrogen-containing ligands at least one of which is a chelating polydentate ligand, 0.ltoreq.y.ltoreq.1, and a=1 for non-chromium containing catalysts and wherein 0.5.ltoreq.a.ltoreq.3 for chromium containing catalysts, and b is <4, prepared by process of
- (a) decomposing a catalyst precursor selected from the group consisting of metal amine molybdates, metal amine tungstates and mixtures thereof, wherein said metal amine catalyst precursor has the general formula
- ML(Mo.sub.y W.sub.1-y O.sub.4).sub.a
- wherein M is Cr and/or one or more divalent promoter metals selected from the group consisting of Mn, Fe, Co, Ni, Cu and Zn, L is one or more neutral nitrogen-containing ligands at least one of which is a chelating polydentate ligand, 0.ltoreq.y.ltoreq.1, for non-chromium containing catalysts a=1, for chromium containing catalysts 0.5.ltoreq.a.ltoreq.3, at a temperature of about 200.degree. C. to about 400.degree. C. in an inert atmosphere; then
- (b)) reducing at a temperature of about 300.degree. C. to about 450.degree. C. said metal amine catalyst precursor to form said mixed metal oxide catalyst with a hydrocarbon feedstream under aromatics hydrogenation process conditions.
- 3. An aromatics hydrogenation process, comprising: contacting a hydrocarbon feedstream under aromatics hydrogenation conditions with a stacked bed catalyst system comprising a first and a second mixed metal oxide catalyst having the formula
- ML(Mo.sub.y W.sub.1-y O.sub.b).sub.a
- wherein M is Cr and/or one or more divalent promoter metals selected from the group consisting of Mn Fe, Co, Ni, Cu and Zn, L is one or more neutral nitrogen-containing ligands at least one of which is a chelating polydentate ligand, 0.ltoreq.y.ltoreq.1, and a=1 for non-chromium containing catalysts and wherein 0.5.ltoreq.a.ltoreq.3 for chromium containing catalysts, and b is <4, wherein said first and said second mixed metal oxide catalysts are prepared by the process of:
- (a) decomposing a catalyst precursor selected from the group consisting of metal amine molybdates, metal amine tungstates and mixtures thereof, wherein said metal amine catalyst precursor has the general formula
- ML(Mo.sub.y W.sub.1-y O.sub.4).sub.a
- where M is Cr and/or one or more divalent promoter metals selected from the group consisting of Mn, Fe, Co, Ni, Cu and Zn; L is one or more neutral nitrogen-containing ligands at least one of which is a chelating polydentate ligand; 0.ltoreq.y.ltoreq.1; and a=1 for non-chromium containing catalysts and wherein 0.5.ltoreq.a.ltoreq.3 for chromium containing catalysts, at a temperature of about 200.degree. C. to about 400.degree. C. in an inert atmosphere; then
- (b) reducing at a temperature of about 300.degree. C. to about 450.degree. C. said metal amine catalyst precursor to form said mixed metal oxide catalyst and wherein the catalyst having the greater activity is the second catalyst.
Parent Case Info
This is a Continuation-In-Part of U.S. Ser. No. 460,318 filed on Jun. 2, 1995 abandoned, which is a Rule 60 Divisional of U.S. Ser. No. 245,180 filed on May 17, 1994 (now abandoned).
US Referenced Citations (13)
Foreign Referenced Citations (1)
Number |
Date |
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1412641 |
Nov 1975 |
GBX |
Divisions (1)
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Number |
Date |
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Parent |
245180 |
May 1994 |
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Continuation in Parts (1)
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Number |
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460318 |
Jun 1995 |
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