Patent US4663300A successfully refreshed from Google Patents.
US4663300A
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Pollution control catalyst
Assignee: Honeywell UOP LLC
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Filing: 1985-12-23
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Granted: 1987-05-05
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Expires: 2005-12-23
Abstract
Abstract A catalyst composition and a process are presented for the reduction of nitrogen oxides in flue gases to nitrogen. The catalyst comprises titania, mordenite and a metal component. The preferred metal component comprises vanadium oxide and tungsten oxide. At least 15 wt. % mordenite is present, with high silica H-mordenite being preferred.
Inventors
- 👤 George R. Lester
- 👤 John F. Brennan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:31
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/18; B01J29/26; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9404; B01D53/9409; B01D53/9413; B01D53/9418; B01J29/20; B01J29/24; B01D2251/00; B01D2251/20; B01D2251/206; B01D2251/2062; B01D2255/00; B01D2255/20; B01D2255/207; B01D2255/20707; B01D2255/20723; B01D2255/20746; B01D2255/20769; B01D2255/20776; B01D2255/50
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
54 words
A catalyst composition useful in pollution control processes which comprises an admixture of at least 15 wt.% titania, at least 15 wt.% mordenite and at least 0.5 wt.% of a metal component comprising an oxide and/or an elemental form of a metal chosen from the group consisting of molybdenum, vanadium, tungsten, chromium, and iron.
Claim 2
Dependent Claim
54 words
A catalyst composition useful in pollution control processes which comprises an admixture of at least 15 wt.% titania, at least 15 wt.% mordenite and at least 0.5 wt.% of a metal component comprising an oxide and/or an elemental form of a metal chosen from the group consisting of molybdenum, vanadium, tungsten, chromium, and iron.
Claim 3
Dependent Claim
15 words
The catalyst of claim 1 further characterized in that the catalyst comprises a vanadium oxide.
Claim 4
Dependent Claim
15 words
The catalyst of claim 1 further characterized in that the catalyst comprises a tungsten oxide.
Claim 5
Dependent Claim
15 words
The catalyst of claim 3 further characterized in that the catalyst comprises a vanadium oxide.
Claim 6
Dependent Claim
17 words
The catalyst of claim 4 further characterized in that the catalyst comprises at least 40 wt.% mordenite.
Claim 7
Dependent Claim
19 words
The catalyst of claim 1 further characterized in that the mordenite has a silicon to aluminum ratio above 10.0.
Claim 8
Dependent Claim
60 words
A catalytic composite useful in processes for the reduction of nitrogen oxides in gas streams which comprises an admixture of at least 25 wt.% titania, at least 25 wt.% mordenite and at least 0.5 wt.% of a metal component comprising an oxide and/or an elemental form of a metal chosen from the group consisting of molybdenum, vanadium, tungsten, and chromium.
Claim 9
Dependent Claim
60 words
A catalytic composite useful in processes for the reduction of nitrogen oxides in gas streams which comprises an admixture of at least 25 wt.% titania, at least 25 wt.% mordenite and at least 0.5 wt.% of a metal component comprising an oxide and/or an elemental form of a metal chosen from the group consisting of molybdenum, vanadium, tungsten, and chromium.
Claim 10
Dependent Claim
19 words
The catalyst of claim 7 further characterized in that the catalyst comprises over 1.5 wt.% of the metal component.
Claim 11
Dependent Claim
17 words
The catalyst of claim 8 further characterized in that the catalyst comprises at least 10 wt.% alumina.
Claim 12
Dependent Claim
15 words
The catalyst of claim 8 further characterized in that the catalyst comprises a vanadium oxide.
Claim 13
Dependent Claim
15 words
The catalyst of claim 10 further characterized in that the catalyst comprises a tungsten oxide.
Claim 14
Dependent Claim
13 words
The catalyst of claim 10 further characterized in that the mordenite is H-mordenite.
Claim 15
Dependent Claim
17 words
The catalyst of claim 12 further characterized in that the catalyst comprises at least, 40 wt.% mordenite.
Claim 16
Dependent Claim
17 words
The catalyst of claim 7 further characterized in that the catalyst comprises at least 40 wt.% titania.
Claim 17
Dependent Claim
19 words
The catalyst of claim 14 further characterized in that the catalyst comprises a vanadium oxide and a tungsten oxide.
Claim 18
Dependent Claim
20 words
The catalyst of claim 15 further characterized in that the catalyst comprises at least 1.5 wt.% of the metal component.
Claim 19
Dependent Claim
20 words
The catalyst of claim 16 further characterized in that the catalyst comprises at least 2.5 wt.% of the metal component.
Claim 20
Dependent Claim
19 words
The catalyst of claim 16 further characterized in that the mordenite has a silicon to aluminum ratio above 10:1.
Claim 21
Dependent Claim
19 words
The catalyst of claim 18 further characterized in that the mordenite has a silicon to aluminum ratio above 40:1.
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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) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |