US5149464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic gas conversion method
Assignee: Gas Technology Institute
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Filing: 1990-06-29
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Granted: 1992-09-22
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Expires: 2010-06-29
Abstract
Abstract A method for selectively oxygenating methane to carbon monoxide and hydrogen by bringing the reactant gas mixture at a temperature of at least 600 DEG C. into contact with a sold catalyst which is either: a) a catalyst of the formula MxM'yOz where: M is at least one element selected from Mg, B, Al, Ln, Ga, Si, Ti, Zr and Hf, Ln is at least one member of lanthanum and the lanthanide series of elements, M'is a d-block transition metal, and each of the ratios x/z and y/z and (x+y)/z is independently from 0.1 to 8; or b) an oxide of a d-block transition metal; or c) a d-block transition metal on a refractory support; or d) a catalyst formed by heating a) or b) under the conditions of the reaction or under non-oxidizing conditions.
Inventors
- 👤 Malcolm L. H. Green
- 👤 Anthony K. Cheetham
- 👤 Patrick D. F. Vernon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:31
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; C01B3/40; B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; B01J23/00; B01J23/005; B01J23/38; B01J23/40; B01J23/54; B01J23/56; B01J23/63; B01J23/70; B01J23/74; B01J23/76; C01B3/386; C01B2203/00; C01B2203/02; C01B2203/025; C01B2203/0261; C01B2203/10; C01B2203/1005; C01B2203/1011; C01B2203/1041; C01B2203/1047; C01B2203/1052; C01B2203/1064; C01B2203/107; C01B2203/1082; C01B2203/12; C01B2203/1205; C01B2203/1211; C01B2203/1235; C01B2203/1241; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
195 words
A hydrogen and carbon monoxide selective single step method of converting methane and oxygen in a molar ratio of about 1.7 to 2.3 into a product gas comprsiing mainly hydrogen and carbon monoxide and lesser amounts of water and carbon dioxide in which the H 2 :H 2 O ratio is at least about 8 and the CO:CO 2 ratio is at least about 8, said method comprises contacting said methane and oxygen without the addition of H 2 O at a temperatur eof about 650° to 900° C. and pressure of about 10 to about 600 kPa and a solid catalyst of the formula M x M' y O z where M is selected from the group consisting of Mg, B, Al, Ga, Si, Ti, Zr, Hf and Ln wherein Ln is a member of the lanthanum and lanthanide series of elements; M' is a d-block transiton metal selected from the group consisting of Fe, Os, Co, Rh, Ir, Pd, PT, Ni and Ru; and each of the ratios x/z, y/z and (x+y)/z is about 0.1 to 8; and a catalyst formed by heating said M x M' y O z under non-oxidizing conditions.
Claim 2
Dependent Claim
195 words
A hydrogen and carbon monoxide selective single step method of converting methane and oxygen in a molar ratio of about 1.7 to 2.3 into a product gas comprsiing mainly hydrogen and carbon monoxide and lesser amounts of water and carbon dioxide in which the H 2 :H 2 O ratio is at least about 8 and the CO:CO 2 ratio is at least about 8, said method comprises contacting said methane and oxygen without the addition of H 2 O at a temperatur eof about 650° to 900° C. and pressure of about 10 to about 600 kPa and a solid catalyst of the formula M x M' y O z where M is selected from the group consisting of Mg, B, Al, Ga, Si, Ti, Zr, Hf and Ln wherein Ln is a member of the lanthanum and lanthanide series of elements; M' is a d-block transiton metal selected from the group consisting of Fe, Os, Co, Rh, Ir, Pd, PT, Ni and Ru; and each of the ratios x/z, y/z and (x+y)/z is about 0.1 to 8; and a catalyst formed by heating said M x M' y O z under non-oxidizing conditions.
Claim 3
Dependent Claim
11 words
A method as claimed in claim 1 wherein M is Ln.
Claim 4
Dependent Claim
24 words
A method as claimed in claim 1 wherein M' is selected from the group consisting of Ru, Os, Co, Rh, Ir, Pd and Pt.
Claim 5
Dependent Claim
11 words
A method as claimed in claim 2 wherein M' is Ru.
Claim 6
Dependent Claim
31 words
A method as claimed in claim 1 wherein said catalyst is selected from the group consisting of Sm 2 Ru 2 O 7 and Pr 2 Ru 2 O 7 .
Claim 7
Dependent Claim
15 words
A method as claimed in claim 1 wherein said temperature about 700° to 800° C.
Claim 8
Dependent Claim
23 words
A method as claimed in claim 1 wherein each of said ratios x/z and y/z and (x+y)/z is independently about 0.2 to 1.00.
Claim 9
Dependent Claim
14 words
A method as claimed in claim 1 wherein said oxygen is supplied by air.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-22 | 1996-03-23 | 1996-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-22 | 2000-03-23 | 2000-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-22 | 2004-03-23 | 2004-09-22 | $7700.00 | Window Closed / Lapsed |