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Patent US4170627A successfully refreshed from Google Patents.
US4170627A
Expired / Lapsed
US
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Process for the simultaneous separation of sulfur and nitrogen oxides from a gaseous mixture
Assignee: Honeywell UOP LLC
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Filing: 1978-04-10
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Granted: 1979-10-09
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Expires: 1998-04-10
Abstract
Abstract An improved process for the simultaneous separation of sulfur and nitrogen oxides from a gaseous mixture containing said oxides and oxygen is disclosed. The gaseous mixture and ammonia are contacted with a solid sulfur oxides acceptor comprising copper, copper oxide, or mixture thereof dispersed on a carrier material in combination with ruthenium and rhenium or the oxides thereof.
Inventors
- 👤 Edward A. Ginger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:26
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8637
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
96 words
A process for the simultaneous separation of oxides of sulfur and nitrogen from a gaseous mixture containing said oxides and oxygen which comprises contacting said mixture and ammonia with a solid sulfur oxides acceptor at a temperature of from about 150° to about 450° C., said solid acceptor comprising copper, copper oxide, or a mixture thereof dispersed on a carrier material in combination with ruthenium and rhenium or the oxides wherein each of the ruthenium and rhenium components comprises for about 0.01 to about 2.0 wt. % of said solid acceptor calculated as the elemental metal.
Claim 2
Dependent Claim
96 words
A process for the simultaneous separation of oxides of sulfur and nitrogen from a gaseous mixture containing said oxides and oxygen which comprises contacting said mixture and ammonia with a solid sulfur oxides acceptor at a temperature of from about 150° to about 450° C., said solid acceptor comprising copper, copper oxide, or a mixture thereof dispersed on a carrier material in combination with ruthenium and rhenium or the oxides wherein each of the ruthenium and rhenium components comprises for about 0.01 to about 2.0 wt. % of said solid acceptor calculated as the elemental metal.
Claim 3
Dependent Claim
29 words
The process of claim 1 further characterized in that said copper, copper oxide, or mixture thereof comprises from about 5 to about 15 wt. % of said solid acceptor.
Claim 4
Dependent Claim
27 words
The process of claim 1 further characterized in that said carrier material is an alumina with a surface area of at least about 50 m 2 /gm.
Claim 5
Dependent Claim
14 words
The process of claim 1 further characterized in that said carrier material is gamma-alumina.
Claim 6
Dependent Claim
14 words
The process of claim 1 further characterized in that said carrier material is eta-alumina.
Claim 7
Dependent Claim
33 words
The process of claim 1 further characterized in that said ammonia is employed in from about a 0.1:1 to about a 2.5:1 mole ratio with the nitrogen oxides content of said gaseous mixture.
Claim 8
Dependent Claim
39 words
The process of claim 1 further characterized in that said solid acceptor is regenerated by heating the same in contact with a reducing gas comprising hydrogen and carbon monoxide and from about 50 to about 90 vol. % steam.
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) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |