US4271041A
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High surface area molybdenum oxycarbide catalysts
Assignee: Leland Stanford Junior University
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Filing: 1979-02-08
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Granted: 1981-06-02
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Expires: 1999-02-08
Abstract
Abstract Novel, high specific surface area molybdenum oxycarbide catalysts are disclosed. They are prepared by the vapor condensation of molybdenum hexacarbonyl and catalyze the reaction of hydrogen and carbon monoxide to form hydrocarbons. Carburization of the molybdenum oxycarbides increases their activity in the carbon monoxide-hydrogen reaction.
Inventors
- 👤 Michel Boudart
- 👤 Lucien E. Leclercq
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:18
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/04; C01C1/0405; C01C1/0411; B; B01; B01J; B01J27/00; B01J27/20; B01J27/22; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
39 words
The product prepared by carburizing molybdenum oxycarbide having a carbon content less than the stoichiometric carbon content of the compound Mo 2 C, a specific surface area greater than about 20 m 2 /g, and a face-centered cubic lattice.
Claim 2
Dependent Claim
39 words
The product prepared by carburizing molybdenum oxycarbide having a carbon content less than the stoichiometric carbon content of the compound Mo 2 C, a specific surface area greater than about 20 m 2 /g, and a face-centered cubic lattice.
Claim 3
Dependent Claim
12 words
The product of claim 1 wherein the carburizing agent is a hydrocarbon.
Claim 4
Dependent Claim
11 words
The product of claim 2 wherein the carburizing agent is n-butane.
Claim 5
Dependent Claim
19 words
The product of claims 2 or 3 wherein the carburization is carried out at 600° K. to 900° K.
Claim 6
Dependent Claim
17 words
The product of claim 2 wherein the hydrocarbon is an alkane of 1 to 6 carbon atoms.
Claim 7
Dependent Claim
14 words
The product of claim 1 wherein the carburizing agent is H 2 and CO.
Claim 8
Dependent Claim
17 words
The product of claim 6 wherein the carburization is carried out at 600° K. to 900° K.
Claim 9
Dependent Claim
39 words
The product prepared by nitriding molybdenum oxycarbide having a carbon content less than the stoichiometric carbon content of the compound Mo 2 C, a specific surface area greater than about 20 m 2 /g, and a face-centered cubic lattice.
Claim 10
Dependent Claim
39 words
The product prepared by nitriding molybdenum oxycarbide having a carbon content less than the stoichiometric carbon content of the compound Mo 2 C, a specific surface area greater than about 20 m 2 /g, and a face-centered cubic lattice.
Claim 11
Dependent Claim
46 words
Process for altering the catalytic activity of molybdenum oxycarbide having a carbon content less than the stoichiometric carbon content of the compound Mo 2 C, a specific surface area greater than about 20 m 2 /g, and a face-centered cubic lattice comprising carburizing said molybdenum oxycarbide.
Claim 12
Dependent Claim
46 words
Process for altering the catalytic activity of molybdenum oxycarbide having a carbon content less than the stoichiometric carbon content of the compound Mo 2 C, a specific surface area greater than about 20 m 2 /g, and a face-centered cubic lattice comprising carburizing said molybdenum oxycarbide.
Claim 13
Dependent Claim
17 words
The process of claim 9 wherein the carburizing agent is H 2 and CO or a hydrocarbon.
Claim 14
Dependent Claim
19 words
The process of claims 9 or 10 wherein the carburization is carried out at 600° K. to 900° K.
Claim 15
Dependent Claim
23 words
The process of claim 13 wherein step (b) is carried out at a temperature in the range of 1773° K. to 2073° K.
Claim 16
Dependent Claim
67 words
Process for preparing a molybdenum oxycarbide of high specific surface area comprising: (a) vaporizing molybdenum hexacarbonyl in a reducing atmosphere at low pressure, (b) reacting the product of (a) with the reducing atmosphere at a temperature in the range of 1373° K. to 2073° K. and a pressure in the range of 20 Torr to 100 Torr, and (c) condensing the vapors in a substantially nonoxidizing atmosphere.
Claim 17
Dependent Claim
67 words
Process for preparing a molybdenum oxycarbide of high specific surface area comprising: (a) vaporizing molybdenum hexacarbonyl in a reducing atmosphere at low pressure, (b) reacting the product of (a) with the reducing atmosphere at a temperature in the range of 1373° K. to 2073° K. and a pressure in the range of 20 Torr to 100 Torr, and (c) condensing the vapors in a substantially nonoxidizing atmosphere.
Claim 18
Dependent Claim
18 words
The process of claim 13 wherein the reducing atmosphere is composed of hydrogen, carbon monoxide, or mixtures thereof.
Claim 19
Dependent Claim
14 words
The process of claim 14 wherein the reducing atmosphere also includes an inert gas.
Claim 20
Dependent Claim
24 words
The process of claim 13 wherein the reducing atmosphere and the substantially nonoxidizing atmosphere are composed of the same gas or mixture of gases.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-01 | 1984-12-01 | 1985-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-01 | 1988-12-01 | 1989-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-01 | 1992-12-01 | 1993-06-02 | $7700.00 | Window Closed / Lapsed |