US5242882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for the production of nitric acid by oxidation of ammonia
Assignee: ADVANCED CATALYST LLC
•
Filing: 1992-11-30
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Granted: 1993-09-07
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Expires: 2012-11-30
Abstract
Abstract Reticulated ceramic or metal substrate coated with Cobalt compounds, noble metals or mixtures thereof are superior catalysts for the oxidation of ammonia to produce nitric oxide.
Inventors
- 👤 Larry E. Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:46
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/89; B01J23/8913; B01J37/00; B01J37/02; B01J37/0215; C; C01; C01B; C01B21/00; C01B21/20; C01B21/24; C01B21/26; C01B21/265; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249956; Y10T428/249957
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
38 words
A catalyst structure for the oxidation of ammonia to produce nitric oxide consisting essentially of a substrate of reticulated ceramic foam or reticulated metal foam having coated substantially uniformly thereover from 1 to 70 weight % cobalt compound.
Claim 2
Dependent Claim
38 words
A catalyst structure for the oxidation of ammonia to produce nitric oxide consisting essentially of a substrate of reticulated ceramic foam or reticulated metal foam having coated substantially uniformly thereover from 1 to 70 weight % cobalt compound.
Claim 3
Dependent Claim
20 words
The catalyst structure according to claim 1 wherein from 15 to 50 weight % cobalt is coated on said substrate.
Claim 4
Dependent Claim
15 words
The catalyst structure according to claim 1 wherein said substrate has a substantially continuous coating.
Claim 5
Dependent Claim
14 words
The catalyst structure according to claim 1 wherein said cobalt compound is cobalt oxide.
Claim 6
Independent Claim
116 words
The method of preparing a catalyst structure for the oxidation of ammonia to produce nitric oxide comprising a substrate of reticulated ceramic foam or reticulated metal foam having coated substantially uniformly thereover from 1 to 70 weight % cobalt comprising: (a) preparing a solution comprising an organic solvent and from about 1 to 30 wt. % of a carboxylate salt of cobalt; (b) immersing a substrate of reticulated ceramic foam or reticulated metal foam in said solution to cover said substrate with said solution; (c) removing said solution covered substrate from said solution; and (d) heating at 260° to 800° C. for a sufficient time to oxidize said salt to provide a coating over the substrate.
Claim 7
Independent Claim
116 words
The method of preparing a catalyst structure for the oxidation of ammonia to produce nitric oxide comprising a substrate of reticulated ceramic foam or reticulated metal foam having coated substantially uniformly thereover from 1 to 70 weight % cobalt comprising: (a) preparing a solution comprising an organic solvent and from about 1 to 30 wt. % of a carboxylate salt of cobalt; (b) immersing a substrate of reticulated ceramic foam or reticulated metal foam in said solution to cover said substrate with said solution; (c) removing said solution covered substrate from said solution; and (d) heating at 260° to 800° C. for a sufficient time to oxidize said salt to provide a coating over the substrate.
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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) | 1996-09-06 | 1997-03-08 | 1997-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-06 | 2001-03-08 | 2001-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-06 | 2005-03-08 | 2005-09-07 | $7700.00 | Window Closed / Lapsed |