US3963827A
Expired / Lapsed
US
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Catalysis
Assignee: Johnson Matthey PLC
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Filing: 1972-10-26
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Granted: 1976-06-15
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Expires: 1992-10-26
Abstract
Abstract This invention relates to a catalyst suitable for use in the process of a) the reduction of an oxide of nitrogen present in a gas containing nitrogen, and b) for the oxidation of carbon monoxide or one or more organic compounds present in a gas. The catalyst comprises an inert material impregnated or coated with a mixture or alloy comprising 5-75 weight % ruthenium, optionally 0-30 weight % base metal and balance platinum in an amount not less than 5 weight %.
Inventors
- 👤 Gary James Keith Acres
- 👤 Barry John Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:41
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; B01D53/74; B01D53/86; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/46; B01J23/462; B01J23/54; B01J23/56; B01J23/64; B01J23/70; B01J23/89; B01J35/00; B01J35/30; B01J35/391; B01J35/395; B01J2235/00; B01J2235/15; B01J29/00; F; F02; F02B; F02B1/00; F02B1/02; F02B1/04; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
106 words
A process for the reduction of an oxide of nitrogen present in a gas including passing at an elevated temperature the gas together with a gaseous fuel through a supported catalyst comprising an inert material impregnated or coated with a mixture or alloy comprising, apart from impurities, 5 to 75 wt% ruthenium, some up to 30 wt% base metal selected from the group consisting of Al, Mg, Cr, Mo, W, Mn, Fe, Re, Co, Ni, Ti, V, Th, U, Cu, Ag, Zn, Cd, Hg, In, Tl, Bi, Sn, Pb, Sb, the lanthanides and the actinides and balance platinum in an amount not less than 5 wt%.
Claim 2
Dependent Claim
106 words
A process for the reduction of an oxide of nitrogen present in a gas including passing at an elevated temperature the gas together with a gaseous fuel through a supported catalyst comprising an inert material impregnated or coated with a mixture or alloy comprising, apart from impurities, 5 to 75 wt% ruthenium, some up to 30 wt% base metal selected from the group consisting of Al, Mg, Cr, Mo, W, Mn, Fe, Re, Co, Ni, Ti, V, Th, U, Cu, Ag, Zn, Cd, Hg, In, Tl, Bi, Sn, Pb, Sb, the lanthanides and the actinides and balance platinum in an amount not less than 5 wt%.
Claim 3
Dependent Claim
107 words
A process for the oxidation of carbon monoxide or one or more organic compounds present in a gas including passing, at elevated temperature, the gas together with oxygen through a supported catalyst comprising an inert material impregnated or coated with a mixture of alloy comprising, apart from impurities, 5 to 75 wt% ruthenium, some up to 30 wt% base metal selected from the group consisting of Al, Mg, Cr, Mo, W, Mn, Fe, Re, Co, Ni, Ti, V, Th, U, Cu, Ag, Zn, Cd, Hg, In, Tl, Bi, Sn, Pb, Sb, the lanthanides and the actinides and balance platinum in an amount not less than 5 wt%.
Claim 4
Dependent Claim
107 words
A process for the oxidation of carbon monoxide or one or more organic compounds present in a gas including passing, at elevated temperature, the gas together with oxygen through a supported catalyst comprising an inert material impregnated or coated with a mixture of alloy comprising, apart from impurities, 5 to 75 wt% ruthenium, some up to 30 wt% base metal selected from the group consisting of Al, Mg, Cr, Mo, W, Mn, Fe, Re, Co, Ni, Ti, V, Th, U, Cu, Ag, Zn, Cd, Hg, In, Tl, Bi, Sn, Pb, Sb, the lanthanides and the actinides and balance platinum in an amount not less than 5 wt%.
Claim 5
Dependent Claim
17 words
A process according to claim 1 wherein the mixture or alloy contains 5 to 65 wt% ruthenium.
Claim 6
Dependent Claim
18 words
A process according to claim 3 wherein the mixture or alloy contains 10 to 60 wt % ruthenium.
Claim 7
Dependent Claim
17 words
A process according to claim 3 wherein the mixture or alloy contains 5 to 45 wt% ruthenium.
Claim 8
Dependent Claim
15 words
A process according to claim 3 wherein the mixture or alloy contains 35 wt% ruthenium.
Claim 9
Dependent Claim
17 words
A process according to claim 3 wherein the mixture or alloy contains 5 to 10 wt% ruthenium.
Claim 10
Dependent Claim
19 words
A process according to claim 1 wherein the mixture or alloy contains a trace to 20 wt% base metal.
Claim 11
Dependent Claim
33 words
A process according to claim 1 wherein the inert material support is pretreated with a refractory oxide which is unreactive with the inert material and before application thereto of the mixture or alloy.
Claim 12
Dependent Claim
33 words
A process according to claim 9 wherein the refractory oxide is selected from the oxides of scandium, yttrium, the lanthanides, and of the metals of Groups III and IV of the Periodic Table.
Claim 13
Dependent Claim
29 words
A process according to claim 10 wherein the refractory oxide is selected from the group consisting of oxides of Be, Mg, B Al, Si, Ti, Zr, Hf, and Th.
Claim 14
Dependent Claim
15 words
A process according to claim 10 wherein the refractory oxide is an oxide of neodymium.
Claim 15
Dependent Claim
25 words
A process according to claim 9 wherein the treatment is in the form of a continuous or discontinuous film of thickness 0.0004 to 0.001 inch.
Claim 16
Dependent Claim
17 words
A process according to claim 1 in which the inert material is a unitary porous refractory compound.
Claim 17
Dependent Claim
55 words
A process according to claim 14 in which the refractory compound is selected from the group consisting of oxides of Mg, Ca, Sr, Ba, Al, Sc, Y, the lanthanides, the actinides, Ga, In, Tl, Si, Ti, Zr, Hf, Th, Ge, Sn, Pb, V, Nb, Ta, Cr, Mo, W, U, transition metal carbides, borides and silicides.
Claim 18
Dependent Claim
19 words
A process according to claim 14 in which the refractory compound is in the form of a ceramic material.
Claim 19
Dependent Claim
17 words
A process according to claim 14 in which the refractory compound is of a corrugated cellular structure.
Claim 20
Dependent Claim
15 words
A process according to claim 17 in which the corrugated cellular structure is a honeycomb.
Claim 21
Dependent Claim
32 words
A process according to claim 16 in which the ceramic material is selected from the group consisting of zircon-mullite, mullite, alpha alumina, sillimanite, magnesium silicates, zircon, petalite, spodumene, cordierite and alumino silicates.
Claim 22
Dependent Claim
17 words
A process according to claim 2 wherein the mixture or alloy contains 5 to 65 wt% ruthenium.
Claim 23
Dependent Claim
17 words
A process according to claim 2 wherein the mixture or alloy contains 10 to 60 wt% ruthenium.
Claim 24
Dependent Claim
17 words
A process according to claim 2 wherein the mixture or alloy contains 5 to 45 wt% ruthenium.
Claim 25
Dependent Claim
15 words
A process according to claim 2 wherein the mixture or alloy contains 35 wt% ruthenium.
Claim 26
Dependent Claim
17 words
A process according to claim 2 wherein the mixture or alloy contains 5 to 10 wt% ruthenium.
Claim 27
Dependent Claim
19 words
A process according to claim 2 wherein the mixture or alloy contains a trace to 20 wt% base metal.
Claim 28
Dependent Claim
33 words
A process according to claim 2 wherein the inert material support is pretreated with a refractory oxide which is unreactive with the inert material and before application thereto of the mixture or alloy.
Claim 29
Dependent Claim
33 words
A process according to claim 26 wherein the refractory oxide is selected from the oxides of scandium, yttrium, the lanthanides, and of the metals of Groups III and IV of the Periodic Table.
Claim 30
Dependent Claim
29 words
A process according to claim 27 wherein the refractory oxide is selected from the group consisting of oxides of Be, Mg, B, Al, Si, Ti, Zr, Hf, and Th.
Claim 31
Dependent Claim
15 words
A process according to claim 27 wherein the refractory oxide is an oxide of neodymium.
Claim 32
Dependent Claim
25 words
A process according to claim 26 wherein the treatment is in the form of a continuous or discontinuous film of thickness 0.0004 to 0.001 inch.
Claim 33
Dependent Claim
16 words
A process according to claim 2 wherein the inert material is a unitary porous refractory compound.
Claim 34
Dependent Claim
54 words
A process according to claim 31 wherein the refractory compound is selected from the group consisting of oxides of Mg, Ca, Sr, Ba, Al, Sc, Y, the lanthanides, the actinides, Ga, In, Tl, SI, Ti, Zr, Hf, Th, Ge, Sn, Pb, V, Nb, Ta, Cr, Mo, W, U, transition metal carbides, borides and silicides.
Claim 35
Dependent Claim
18 words
A process according to claim 31 wherein the refractory compound is in the form of a ceramic material.
Claim 36
Dependent Claim
16 words
A process according to claim 31 wherein the refractory compound is of a corrugated cellular structure.
Claim 37
Dependent Claim
14 words
A process according to claim 34 wherein the corrugated cellular structure is a honeycomb.
Claim 38
Dependent Claim
31 words
A process according to claim 33 wherein the ceramic material is selected from the group consisting of zircon-mullite, mullite, alpha alumina, sillimanite, magnesium silicates, zircon, petalite, spodumene, cordierite and alumino silicates.
Claim 39
Dependent Claim
18 words
A process according to claim 1 wherein the base metal is Co, Ni, V, Fe, Cr or Re.
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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) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |