US4639432A
Expired / Lapsed
US
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Oxidation catalysts
Assignee: UOP Ltd
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Filing: 1983-10-18
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Granted: 1987-01-27
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Expires: 2003-10-18
Abstract
Abstract Catalysts adapted to catalyse the oxidation of carbon monoxide to carbon dioxide comprise palladium, one or more of the metals platinum, ruthenium, rhodium and iridium and one or more of the metals copper, nickel, cobalt, iron, manganese, silver, lanthanum, cerium, praseodymium and neodymium on substantially chloride-free stannic oxide supports.
Inventors
- 👤 Andrew Holt
- 👤 Martin G. Cheek
- 👤 Ernest N. Clegg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:54
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/89; B01J23/8933; B01J23/8986; A; A62; A62B; A62B19/00; A62B19/02; A62D; A62D9/00; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/864; B01J23/38; B01J23/54; B01J23/56; B01J23/64; B01J23/656; B01J23/6562; B01J23/62; B01J23/622; B01J23/626
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
107 words
A catalyst for catalyzing the oxidation, in the presence of oxygen, of carbon monoxide to carbon dioxide, said catalyst being substantially chloride-free and consisting essentially of stannic oxide supporting a mixture of (i) palladium, (ii) at least one member of the group consisting of platinum, ruthenium, rhodium and iridium and (iii) at least one metal selected from the group consisting of copper, nickel, cobalt, iron, manganese, silver, lanthanum, cerium, praseodymium and neodymium, said catalyst being suitable for use at ambient or sub-ambient temperature and being characterized by enhanced activity for said oxidation and reduced proneness to deactivation in service by the incorporation therein of (ii) and (iii).
Claim 2
Dependent Claim
107 words
A catalyst for catalyzing the oxidation, in the presence of oxygen, of carbon monoxide to carbon dioxide, said catalyst being substantially chloride-free and consisting essentially of stannic oxide supporting a mixture of (i) palladium, (ii) at least one member of the group consisting of platinum, ruthenium, rhodium and iridium and (iii) at least one metal selected from the group consisting of copper, nickel, cobalt, iron, manganese, silver, lanthanum, cerium, praseodymium and neodymium, said catalyst being suitable for use at ambient or sub-ambient temperature and being characterized by enhanced activity for said oxidation and reduced proneness to deactivation in service by the incorporation therein of (ii) and (iii).
Claim 3
Dependent Claim
33 words
A catalyst according to claim 1 consisting essentially of 0.5-5 wt. percent palladium, 0.5-5 wt. percent platinum and 0.1-25 wt. percent of either nickel or manganese supported on a carrier of stannic oxide.
Claim 4
Dependent Claim
33 words
A catalyst according to claim 2 consisting essentially of 0.5-2.5 wt. percent platinum, 0.5-2.5 wt. percent palladium and 0.1-5 wt. percent of either nickel or manganese supported on a carrier of stannic oxide.
Claim 5
Dependent Claim
31 words
A catalyst according to claim 2 wherein the carrier of stannic oxide is in the form of powder, granules or self-supporting bodies formed from the said powder or the said granules.
Claim 6
Dependent Claim
31 words
A catalyst according to claim 2 consisting essentially of 2 wt. percent palladium, 2 wt. percent platinum and 0.5 wt. percent nickel deposited on and within self-supporting bodies of stannic oxide.
Claim 7
Dependent Claim
30 words
A catalyst according to claim 1 consisting essentially of 96 wt. percent stannic oxide as the carrier, 0.5 wt. percent manganese, 2.0 wt. percent palladium and 1.5 wt. percent platinum.
Claim 8
Dependent Claim
30 words
A catalyst according to claim 1 consisting essentially of 96.3 wt. percent stannic oxide as the carrier, 0.5 wt. percent manganese, 2.0 wt. percent palladium and 1.2 wt. percent platinum.
References Cited (Backward Citations)
US4006103A
Cited
US3929965A
Cited
US4128503A
Cited
US4162235A
Cited
US4171288A
Cited
US4378307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |