US4124689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the oxidation of carbon monoxide to carbon dioxide
Assignee: University of Southern California
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Filing: 1977-12-08
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Granted: 1978-11-07
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Expires: 1997-12-08
Abstract
Abstract A process for the oxidation of carbon monoxide to carbon dioxide in the presence of elemental nitrogen with minimal oxidation thereof which comprises combining the carbon monoxide with a predetermined amount of oxygen containing gas to give at least 1% stoichiometric excess of oxygen for the oxidation of carbon monoxide to carbon dioxide and passing the resulting mixture over a ceramic catalyst of the following empirical formula at a temperature between about 100 DEG C and about 1,000 DEG C; WkXnJ(1-k-n)ZO(3+/-m) WHEREIN W is Zirconium, Tin or Thorium or mixtures thereof; X is an alkaline earth metal or mixture thereof; J is scandium, ytrrium, a rare-earth element or mixture thereof; Z is a metal of the first transition series or a mixture thereof, at least 0.01% of said metal having an oxidation state other than +3; K IS A NUMBER HAVING A VALUE BETWEEN 0 AND ABOUT 0.
Inventors
- 👤 James M. Whelan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:54
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/835; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/864; B01D53/92; B01D53/94; B01D53/9404; B01D53/9409; B01D53/9413; B01D53/9418; B01D53/9436; B01J23/10; B01J23/16; B01J23/20; B01J23/22; B01J23/24; B01J23/26; B01J23/32; B01J23/34; B01J23/78; B01J23/83; C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/76; C01B17/78; C01B21/00; C01B21/20; C01B21/24; C01B21/26; C01B21/265; C01B32/00; C01B32/50; C01B5/00; B01D2255/00; B01D2255/20; B01D2255/204; B01D2255/2042; B01D2255/206; B01D2255/2061; B01D2255/2063; B01D2255/2065; B01D2255/2068; B01D2255/207; B01D2255/20707; B01D2255/2073; B01D2255/20746; B01D2255/20753; B01D2255/20784; Y; Y02; Y02C; Y02C20/00; Y02C20/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
194 words
A process for the selective oxidation of carbon monoxide to carbon dioxide in the presence of elemental nitrogen with minimal oxidation thereof, which comprises combining the carbon monoxide with a predetermined amount of oxygen containing gas to give at least a 1% stoichiometric excess of oxygen for the oxidation of the carbon monoxide to carbon dioxide; and passing the resulting mixture over a ceramic catalyst of the following empirical formula at a temperature between about 100° C. and about 1,000° C.: w.sub.k X.sub.n J.sub.(1-k-n) ZO.sub.(3±m) wherein W is Zirconium, Tin or Thorium or mixtures thereof; X is an alkaline earth metal or mixture thereof; J is scandium yttrium a rare-earth element or mixture thereof; Z is a metal of the first transition series or a mixture thereof, at least 0.01% of said metal having an oxidation state other than +3; k is a number having a value between 0 and about 0.1; m is a number having a value of from 0 to about 0.26; and n is a number having a value from 0 to about 0.51, provided when n has a value of 0, k has a value between 0 and 0.05.
Claim 2
Dependent Claim
194 words
A process for the selective oxidation of carbon monoxide to carbon dioxide in the presence of elemental nitrogen with minimal oxidation thereof, which comprises combining the carbon monoxide with a predetermined amount of oxygen containing gas to give at least a 1% stoichiometric excess of oxygen for the oxidation of the carbon monoxide to carbon dioxide; and passing the resulting mixture over a ceramic catalyst of the following empirical formula at a temperature between about 100° C. and about 1,000° C.: w.sub.k X.sub.n J.sub.(1-k-n) ZO.sub.(3±m) wherein W is Zirconium, Tin or Thorium or mixtures thereof; X is an alkaline earth metal or mixture thereof; J is scandium yttrium a rare-earth element or mixture thereof; Z is a metal of the first transition series or a mixture thereof, at least 0.01% of said metal having an oxidation state other than +3; k is a number having a value between 0 and about 0.1; m is a number having a value of from 0 to about 0.26; and n is a number having a value from 0 to about 0.51, provided when n has a value of 0, k has a value between 0 and 0.05.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |