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US4182694A
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Ruthenium-containing perovskite catalysts
Assignee: EIDP Inc
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Filing: 1978-08-25
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Granted: 1980-01-08
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Expires: 1998-08-25
Abstract
Abstract Catalytic compositions having the general formula, ABO 3 , and a perovskite crystal structure, wherein the A site cations consist essentially of ions of a metal having an atomic number of 11 to 51, 57 to 71 or 89 to 103. About 1% to 20% of the Type B cation sites are occupied by ions of at least one platinum group metal selected from ruthenium, osmium, rhodium, iridium, palladium and platinum, with ruthenium being present and occupying up to about 10% of the Type B cation sites. The balance of 80% to 99% of the Type B cation sites are occupied by ions of at least one metal having an atomic radius between 0.4 to 1.4 Angstroms. The compositions are useful in gaseous oxidation and reduction reactions.
Inventors
- 👤 Alan Lauder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:26
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/63; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; B01J23/002; B01J23/58; B01J23/64; B01J23/70; B01J23/89; B01J2523/00; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S502/00; Y10S502/525
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
130 words
A catalytic composition having the perovskite-type, ABO 3 , crystal structure wherein the Type A cation sites are substantially fully occupied by ions of one metal having an atomic number of 11 to 51, 57 to 71, or 89 to 103; the Type B cation sites are occupied by ions of at least two platinum group metals selected from ruthenium and at least one of osmium, rhodium, iridium, palladium and platinum, wherein ruthenium occupies up to about 10% of the Type B cation sites, with the total platinum group metal ions occupying about 1% to 20% of the Type B cation sites; the remainder of the Type B cation sites are occupied by ions of at least one nonplatinum group metal having an ionic radius between 0.4 to 1.4 Angstroms.
Claim 2
Dependent Claim
130 words
A catalytic composition having the perovskite-type, ABO 3 , crystal structure wherein the Type A cation sites are substantially fully occupied by ions of one metal having an atomic number of 11 to 51, 57 to 71, or 89 to 103; the Type B cation sites are occupied by ions of at least two platinum group metals selected from ruthenium and at least one of osmium, rhodium, iridium, palladium and platinum, wherein ruthenium occupies up to about 10% of the Type B cation sites, with the total platinum group metal ions occupying about 1% to 20% of the Type B cation sites; the remainder of the Type B cation sites are occupied by ions of at least one nonplatinum group metal having an ionic radius between 0.4 to 1.4 Angstroms.
Claim 3
Dependent Claim
106 words
A composition according to claim 1, having the formula A[Ru.sub.x B.sub.y.sup.1 B.sub.z.sup.2 ]O.sub.3 wherein A is substantially fully occupied by ions of one metal having an atomic number of 11 to 51, 57 to 71 or 89 to 103, B 1 is selected from cations of at least one of the platinum group metals rhodium, palladium, osmium, iridium and platinum, B 2 is selected from cations of at least one nonplatinum metal having an ionic radius between 0.4 and 1.4 Angstroms, x is 0.001 to 0.10, y is up to 0.199, x+y is 0.01 to 0.2, z is 0.8 to 0.99, and x+y+z is substantially 1.
Claim 4
Dependent Claim
12 words
A composition according to claim 2, wherein x is 0.005 to 0.1.
Claim 5
Dependent Claim
15 words
A composition according to claim 1, wherein the platinum group metals are ruthenium and platinum.
Claim 6
Dependent Claim
15 words
A composition according to claim 1, wherein the platinum group metals are ruthenium and palladium.
Claim 7
Dependent Claim
15 words
A composition according to claim 1, wherein the platinum group metals are ruthenium and rhodium.
Claim 8
Dependent Claim
16 words
A composition according to claim 1, wherein the platinum group metals are ruthenium, platinum and palladium.
Claim 9
Dependent Claim
16 words
A composition according to claim 1, wherein the platinum group metals are ruthenium, rhodium and platinum.
Claim 10
Dependent Claim
18 words
A composition according to claim 1, wherein the A site cations are ions selected from lanthanum and strontium.
Claim 11
Dependent Claim
24 words
A composition according to claim 9, wherein the nonplatinum B site metal is selected from at least one of cobalt, iron, nickel and copper.
Claim 12
Dependent Claim
11 words
A composition having the nominal formula: La[CO.sub.0.57 Fe.sub.0.17 Ni.sub.0.17 Ru.sub.0.1 ]O.sub.3.
Claim 13
Dependent Claim
11 words
A composition having the nominal formula: La[CO.sub.0.57 Fe.sub.0.17 Ni.sub.0.17 Ru.sub.0.1 ]O.sub.3.
Claim 14
Dependent Claim
15 words
A composition according to claim 10, having the nominal formula: La[Cu.sub.0.1 Co.sub.0.7 Ru.sub.0.1 Pt.sub.0.1 ]O.sub.3.
Claim 15
Dependent Claim
14 words
A composition according to claim 10, having the nominal formula: La[Co.sub.0.9 Ru.sub.0.05 Pd.sub.0.05 ]O.sub.3.
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) | 1983-01-07 | 1983-07-09 | 1984-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-07 | 1987-07-09 | 1988-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-07 | 1991-07-09 | 1992-01-08 | $7700.00 | Window Closed / Lapsed |