US5314673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the conversion of N2 O
Assignee: Invista North America LLC
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Filing: 1992-02-18
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Granted: 1994-05-24
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Expires: 2012-02-18
Abstract
Abstract A process for the conversion of nitrous oxide (N 2 O) to nitrogen and oxygen by treating the gas with a catalyst of cobalt oxide and nickel oxide on a zirconia support at a temperature of at least about 280 degrees C.
Inventors
- 👤 Kristi Anseth
- 👤 Theodore A. Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:31
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/38; B01D53/74; B01D53/86; B01D53/8621; B01D53/8625; B01D53/8628; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/755; Y; Y02; Y02C; Y02C20/00; Y02C20/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
78 words
A process for the conversion of N 2 O to nitrogen and oxygen which comprises contacting the N 2 O with a catalyst consisting essentially of nickel oxide and cobalt oxide on a zirconia substrate in which the amount of nickel oxide plus the amount of cobalt oxide in the catalyst is 10 to 80 percent of the total weight of the catalyst at a temperature of at least about 280 degrees C., and producing nitrogen and oxygen.
Claim 2
Dependent Claim
78 words
A process for the conversion of N 2 O to nitrogen and oxygen which comprises contacting the N 2 O with a catalyst consisting essentially of nickel oxide and cobalt oxide on a zirconia substrate in which the amount of nickel oxide plus the amount of cobalt oxide in the catalyst is 10 to 80 percent of the total weight of the catalyst at a temperature of at least about 280 degrees C., and producing nitrogen and oxygen.
Claim 3
Dependent Claim
31 words
The process of claim 1 in which the ratio of nickel oxide to cobalt oxide in the catalyst is in the range of about 0.5 to 1 to 3 to 1.
Claim 4
Dependent Claim
25 words
The process of claim 1 in which the catalyst is in the form of pellet having a particle size of about 1/8 inch in diameter.
Claim 5
Dependent Claim
26 words
The process of claim 1 in which the N 2 O is heated to a temperature above about 280 degrees C. prior to contacting the catalyst.
References Cited (Backward Citations)
US1845785A
Cited
US4877743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-23 | 1997-11-22 | 1998-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-23 | 2001-11-22 | 2002-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-23 | 2005-11-22 | 2006-05-24 | $7700.00 | Window Closed / Lapsed |