US4233185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalysts for oxidation and reduction
Assignee: Johnson Matthey PLC
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Filing: 1977-11-29
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Granted: 1980-11-11
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Expires: 1997-11-29
Abstract
Abstract A catalyst suitable for use in oxidation and reduction reactions is provided. The catalyst includes an intermetallic compound of Ru, Pd, Ir or Pt and one or more base metals coated upon a substrate.
Inventors
- 👤 Arthur G. Knapton
- 👤 Ian R. McGill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:48
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/54; B01J23/56
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
67 words
A catalyst suitable for use in oxidation and reduction reactions comprising a substrate carrying a coating comprising at least one intermetallic compound selected from the group consisting of TiPt 3 , LnPd, LnPd 3 , Ln 5 Pd 2 (where Ln=Sm, Gd, Dy, Ho and Er), TaIr 3 , NbIr 3 , TaPd, TiRu, NbIr, TaRh 3 , NbRh 3 , VIr 3 and CeRu 2 .
Claim 2
Dependent Claim
67 words
A catalyst suitable for use in oxidation and reduction reactions comprising a substrate carrying a coating comprising at least one intermetallic compound selected from the group consisting of TiPt 3 , LnPd, LnPd 3 , Ln 5 Pd 2 (where Ln=Sm, Gd, Dy, Ho and Er), TaIr 3 , NbIr 3 , TaPd, TiRu, NbIr, TaRh 3 , NbRh 3 , VIr 3 and CeRu 2 .
Claim 3
Dependent Claim
13 words
A catalyst according to claim 1 wherein the substrate is a metallic substrate.
Claim 4
Dependent Claim
23 words
A catalyst according to claim 2 wherein the metallic substrate contains at least one of the metals ruthenium, rhodium, palladium, iridium and platinum.
Claim 5
Dependent Claim
16 words
A catalyst according to claim 2 wherein the metallic substrate contains at least one base metal.
Claim 6
Dependent Claim
23 words
A catalyst according to claim 3 wherein the metallic substrate is platinum, 10% rhodium-platinum alloy or dispersion-strengthed platinum group metals or alloys thereof.
Claim 7
Dependent Claim
30 words
A catalyst according to claim 4 wherein the metallic substrate is made from a nickel and chromium alloy having an aggregate nickel plus chromium content greater than 20% by weight.
Claim 8
Dependent Claim
49 words
A catalyst according to claim 4 wherein the metallic substrate is made from an alloy consisting, apart from impurities, of at least one of the elements chromium (3-40) weight %, aluminum (1-10) weight %, cobalt (trace-5) weight %, nickel (trace-72) weight %, and carbon (trace-0.5) weight %, balance iron.
Claim 9
Dependent Claim
33 words
A catalyst according to claim 4 wherein the metallic substrate is an alloy consisting, apart from impurities, of 0.5-12 weight % Al, 0.1-3.0 weight % Y, 0-20 weight % Cr and balance Fe.
Claim 10
Dependent Claim
33 words
A catalyst according to claim 4 wherein the metallic substrate is an alloy consisting, apart from impurities, of 0.5-4 weight % Al, 0.5-3.0 weight % Y, 20.0-95.0 weight % Cr and balance Fe.
Claim 11
Dependent Claim
28 words
A catalyst according to claim 2 wherein the substrate is in the form of interwoven or randomly oriented wire or mesh, perforated or unperforated, corrugated sheet or foil.
Claim 12
Dependent Claim
19 words
A catalyst according to claim 1 wherein the said coating has a thickness of not more than 15 microns.
Claim 13
Dependent Claim
54 words
A process of making a supported catalyst wherein the substrate comprises interwoven platinum wire, the process comprising heating the substrate at an elevated temperature in an aluminising environment containing Al 2 O 3 and NH 4 Cl so as to produce an intermetallic compound of, PtAl 2 on the surface of the said wire.
Claim 14
Dependent Claim
54 words
A process of making a supported catalyst wherein the substrate comprises interwoven platinum wire, the process comprising heating the substrate at an elevated temperature in an aluminising environment containing Al 2 O 3 and NH 4 Cl so as to produce an intermetallic compound of, PtAl 2 on the surface of the said wire.
Claim 15
Dependent Claim
54 words
A catalyst comprising a substrate carrying a coating comprising an intermetallic compound of at least one of the platinum group metals ruthenium, rhodium, palladium, iridium and platinum and one or more base metals, selected from Ta, Nb, Zr, Hf and V, said catalyst being characterized by its high thermodynamic stability and high catalytic efficiency.
Claim 16
Dependent Claim
54 words
A catalyst comprising a substrate carrying a coating comprising an intermetallic compound of at least one of the platinum group metals ruthenium, rhodium, palladium, iridium and platinum and one or more base metals, selected from Ta, Nb, Zr, Hf and V, said catalyst being characterized by its high thermodynamic stability and high catalytic efficiency.
Claim 17
Dependent Claim
44 words
A catalyst suitable for use in oxidation and reduction reactions comprising a substrate carrying a coating comprising at least one intermetallic compound selected from the group consisting of intermetallic compounds of Ta and Rh, Ta, and Ir, Nb and Rh and Nb and Ir.
Claim 18
Dependent Claim
44 words
A catalyst suitable for use in oxidation and reduction reactions comprising a substrate carrying a coating comprising at least one intermetallic compound selected from the group consisting of intermetallic compounds of Ta and Rh, Ta, and Ir, Nb and Rh and Nb and Ir.
Claim 19
Dependent Claim
22 words
A catalyst according to claim 14 wherein the intermetallic compound is TaIr 3 , NbIr 3 , NbIr or NbRh 3 .
Claim 20
Dependent Claim
16 words
A catalyst according to claim 3 wherein the metallic substrate contains at least one base metal.
Claim 21
Dependent Claim
13 words
A catalyst according to claim 14 wherein the substrate is a metallic substrate.
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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) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |