US3853790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalysts for the oxidation of ammonia to nitrogen oxide
Assignee: TRUST CESKOSLOVENSKEHO PRUMYSL
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Filing: 1972-08-07
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Granted: 1974-12-10
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Expires: 1992-08-07
Abstract
Abstract A catalyst for oxidation of ammonia to nitrogen oxide, in the form of granules, based on oxides of the metals of the group iron, cobalt and nickel, with or without the addition of a promoter with a support based on oxygen-containing compounds of aluminum and method of producing them and more particularly, a) a catalyst for the oxidation of ammonia to nitrogen oxide, in the form of granules with a sintered, porous alumina carrier, formed at least on the outer periphery by an alumina spinel and with a film of catalytically active nickel and cobalt oxides, especially cobaltous-cobaltic oxide with or without an added promotor on the spinel layer, as well as the method of producing and using it.
Inventors
- 👤 J Vosolsobe
- 👤 M Cap
- 👤 M Novak
- 👤 J Michalek
- 👤 A Simecek
- 👤 R Dohnalek
- 👤 B Kadlec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:29
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J21/00; B01J21/005; B01J23/005; B01J23/76; B01J37/00; B01J37/0009; B01J37/0063; C; C01; C01B; C01B21/00; C01B21/20; C01B21/24; C01B21/26; C01B21/265; B01J35/00; B01J35/70; Y; Y10; Y10S; Y10S502/00; Y10S502/524
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
177 words
A GRANULAR CATALYST WHICH CONSISTS ESSENTIALLY OF AN ALUMINA BODY IN SOLID FORM HAVING PARTICLES AT LEAST THE SURFACES OF WHICH CONSIST OF A SPINEL IN WHICH THE METAL COMPONENT OF THE SPINEL IS SELECTED FROM THE GROUP CONSISTING OF COBALT, COBALT-NICKEL, NICKEL-MANGANESE, NICKEL-MAGNESIUM AND NICKEL-BISMUTH, SAID PARTICLES ADDITIONALLY HAVING THEREON A FILM OF CATALYTICALLY ACTIVE METAL OXIDES SELECTED FROM THE GROUP CONSISTING OF COBALT OXIDE, AND COMBINATION OF NICKEL OXIDE WITH EITHER COBALT OXIDE, MANGANESE OXIDE, MAGNESIUM OXIDE, OR BISMUTH OXIDE, SAID CATALYST HAVING BEEN PREPARED BY HEATING AN ALUMINA BODY IMPREGNATED WITH METAL OR METALS FORMING SAID APINEL TO A SINTERING TEMPERATURE OF 1,000*-1,700*C UNTIL SAID ALUMINA BODY HAS REACHED A STABLE CONDITION AND THE SURFACES OF THE ALUMINA IN THE OUTER PERIPHERY OF THE BODY HAVE BEEN CONVERTED TO SAID SPINEL, AND THEREAFTER IMPREGNATING SAID BODY WITH METAL SALT OR SALTS SELECTED FROM THE METALS FORMING SAID GROUP OF METAL OXIDES AND THERMALLY DECOMPOSING SAID METAL SALT OR SALTS TO PROVIDE ON SAID SPINEL A FILM OF CATALYTICALLY ACTIVE MATERIAL OF SAID METAL OXIDES.
Claim 2
Dependent Claim
177 words
A GRANULAR CATALYST WHICH CONSISTS ESSENTIALLY OF AN ALUMINA BODY IN SOLID FORM HAVING PARTICLES AT LEAST THE SURFACES OF WHICH CONSIST OF A SPINEL IN WHICH THE METAL COMPONENT OF THE SPINEL IS SELECTED FROM THE GROUP CONSISTING OF COBALT, COBALT-NICKEL, NICKEL-MANGANESE, NICKEL-MAGNESIUM AND NICKEL-BISMUTH, SAID PARTICLES ADDITIONALLY HAVING THEREON A FILM OF CATALYTICALLY ACTIVE METAL OXIDES SELECTED FROM THE GROUP CONSISTING OF COBALT OXIDE, AND COMBINATION OF NICKEL OXIDE WITH EITHER COBALT OXIDE, MANGANESE OXIDE, MAGNESIUM OXIDE, OR BISMUTH OXIDE, SAID CATALYST HAVING BEEN PREPARED BY HEATING AN ALUMINA BODY IMPREGNATED WITH METAL OR METALS FORMING SAID APINEL TO A SINTERING TEMPERATURE OF 1,000*-1,700*C UNTIL SAID ALUMINA BODY HAS REACHED A STABLE CONDITION AND THE SURFACES OF THE ALUMINA IN THE OUTER PERIPHERY OF THE BODY HAVE BEEN CONVERTED TO SAID SPINEL, AND THEREAFTER IMPREGNATING SAID BODY WITH METAL SALT OR SALTS SELECTED FROM THE METALS FORMING SAID GROUP OF METAL OXIDES AND THERMALLY DECOMPOSING SAID METAL SALT OR SALTS TO PROVIDE ON SAID SPINEL A FILM OF CATALYTICALLY ACTIVE MATERIAL OF SAID METAL OXIDES.
Claim 3
Dependent Claim
22 words
The catalyst according to claim 1 wherein the granules are shaped as rods, with diameter and length from 2 to 10 mm.
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |