US5124304A
Expired / Lapsed
US
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Multi-purpose catalyst for vehicular catalytics converters
Assignee: Pro Catalyse SA
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Filing: 1991-03-12
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Granted: 1992-06-23
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Expires: 2011-03-12
Abstract
Abstract Multiple purpose catalysts adapted for the treatment of internal combustion engine exhaust gases comprise a particulate refractory oxide support, e.g., alumina particles, having an active catalytic phase deposited thereon, said active catalytic phase including zirconium, cerium and platinum, and optionally iridium, rhodium, palladium and other metal values.
Inventors
- 👤 Gilbert Blanchard
- 👤 Jack Caillod
- 👤 Richard Doziere
- 👤 Michel Prigent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:29
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/63; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
62 words
A multi-purpose catalyst composition adapted for the treatment of internal combustion engine exhaust gases, which comprises a particulate refractory oxide active support having an active catalytic phase deposited thereon, said active catalytic phase consisting essentially of a catalytically effective amount of zirconium, cerium and platinum, said particulate refractory support having a specific surface area of from 70 to 350 m 2 /g.
Claim 2
Dependent Claim
62 words
A multi-purpose catalyst composition adapted for the treatment of internal combustion engine exhaust gases, which comprises a particulate refractory oxide active support having an active catalytic phase deposited thereon, said active catalytic phase consisting essentially of a catalytically effective amount of zirconium, cerium and platinum, said particulate refractory support having a specific surface area of from 70 to 350 m 2 /g.
Claim 3
Dependent Claim
26 words
The catalyst composition as defined by claim 1, said active catalytic phase further consisting essentially of at least one of the elements iridium, palladium and rhodium.
Claim 4
Dependent Claim
30 words
The catalyst composition as defined by claim 1, wherein the total amount of cerium and zirconium ranges from 0.1% to 20% by weight, based on the weight of the support.
Claim 5
Dependent Claim
30 words
The catalyst composition as defined by claim 3, wherein the total amount of cerium and zirconium ranges from 0.3% to 12% by weight, based on the weight of the support.
Claim 6
Dependent Claim
27 words
The catalyst composition as defined by claim 3, wherein the amount of platinum ranges from 0.01% to 0.5% by weight, based on the weight of the support.
Claim 7
Dependent Claim
27 words
The catalyst composition as defined by claim 5, wherein the amount of platinum ranges from 0.03% to 0.25% by weight, based on the weight of the support.
Claim 8
Dependent Claim
30 words
The catalyst composition as defined by claim 2, wherein the total amount of iridium and/or rhodium ranges from 0.002% to 0.1% by weight, based on the weight of the support.
Claim 9
Dependent Claim
30 words
The catalyst composition as defined by claim 7, wherein the total amount of iridium and/or rhodium ranges from 0.005% to 0.02% by weight, based on the weight of the support.
Claim 10
Dependent Claim
27 words
The catalyst composition as defined by claim 2, wherein the amount of palladium ranges from 0.01% to 0.5% by weight, based on the weight of the support.
Claim 11
Dependent Claim
27 words
The catalyst composition as defined by claim 9, wherein the amount of palladium ranges form 0.03% to 0.25% by weight, based on the weight of the support.
Claim 12
Dependent Claim
15 words
The catalyst composition as defined by claim 1, which comprises a particulate active alumina support.
Claim 13
Dependent Claim
61 words
The catalyst composition as defined by claim 11, said particulate active alumina support having a specific surface of from 25 to 250 m 2 /g, a total pore volume of from 0.5 to 2.0 cm 3 /g, and a macroporosity such that the volume of pores having a diameter larger than 1000 Å ranges from 0.005 to 0.6 cm 3 /g.
Claim 14
Dependent Claim
103 words
The catalyst composition as defined by claim 11, said particulate active alumina support comprising dual porosity active alumina spheres having a total pore volume of from 0.55 to 1.7 cm 3 /g, a micropore volume of pores having a diameter less than 0.06 μm of from 0.5 to 1.0 cm 3 /g, a macropore volume of pores having a diameter larger than 0.06 μm of from 0.05 to 0.7 cm 3 /g, an average diameter of the macropores of from 0.1 to 10 μm, a specific surface of from 80 to 350 m 2 /g and a crushing strength greater than 1 kg.
Claim 15
Dependent Claim
21 words
The catalyst composition as defined by claim 4, wherein the total amount of cerium and zirconium ranges from 0.3% to 8%.
Claim 16
Dependent Claim
22 words
The catalyst composition as defined by claim 11, wherein said active alumina is in the phase form eta, gamma, delta or theta.
Claim 17
Dependent Claim
24 words
The catalyst composition is defined by claim 1, wherein said particulate refractory oxide active support is active silica, alumina, aluminosilicate or mixed oxides thereof.
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) | 1995-06-23 | 1995-12-23 | 1996-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-23 | 1999-12-23 | 2000-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-23 | 2003-12-23 | 2004-06-23 | $7700.00 | Window Closed / Lapsed |