Patent US4173549A successfully refreshed from Google Patents.
US4173549A
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US
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Catalyst composition for decomposing ozone
Assignee: Plastic Specialties and Technologies Inc
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Filing: 1978-09-22
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Granted: 1979-11-06
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Expires: 1998-09-22
Abstract
Abstract A highly efficient novel catalyst composition for ozone removal is made from (a) metallic silver deposited on a relatively high surface area copper substrate and (b) a composite of a relatively high surface area zirconia and oxides of manganese.
Inventors
- 👤 Ronald A. Kent
- 👤 Marvin M. Fein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:32
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8671; B01D53/8675; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/66; B01J23/68; B01J23/688; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
37 words
A catalyst composition for the decomposition of ozone which comprises: (a) metallic silver deposited on a relatively high surface area copper substrate, and (b) a composite of a relatively high surface area zirconia and oxides of manganese.
Claim 2
Dependent Claim
37 words
A catalyst composition for the decomposition of ozone which comprises: (a) metallic silver deposited on a relatively high surface area copper substrate, and (b) a composite of a relatively high surface area zirconia and oxides of manganese.
Claim 3
Dependent Claim
23 words
The catalyst composition of claim 1 wherein the copper substrate is selected from particulate copper, foamed copper, copper felt and copper wire mesh.
Claim 4
Dependent Claim
22 words
The catalyst composition of claim 1, wherein the zirconia is selected from particulate zirconia, zirconia fibers, fibrous zirconia felt or zirconia cloth.
Claim 5
Dependent Claim
21 words
The catalyst composition of claim 1, wherein the thickness of the silver deposit is between about 0.001 and about 10 mils.
Claim 6
Dependent Claim
17 words
The catalyst composition of claim 4, wherein said thickness is between about 0.1 and about 1 mil.
Claim 7
Dependent Claim
29 words
The catalyst composition of claim 1, wherein the concentration of the oxides of manganese is between about 0.1 and about 10 percent based on the weight of the zirconia.
Claim 8
Dependent Claim
28 words
The catalyst composition of claim 6, wherein the concentration of oxides of manganese is between about 0.1 and about 0.5 percent based on the weight of the zirconia.
Claim 9
Dependent Claim
23 words
The catalyst composition of claim 1 wherein the volumetric ratio of components (a) and (b) is maintained between about 1:5 and about 100:1.
Claim 10
Dependent Claim
17 words
The catalyst composition of claim 8, wherein said volumetric ratio is between about 1:2 and about 50:1.
Claim 11
Dependent Claim
22 words
The catalyst composition of claim 1 wherein the relative density of the copper substrate ranges from about 2 to about 40 percent.
Claim 12
Dependent Claim
21 words
The catalyst composition of claim 1 wherein the relative density of the zirconia ranges from about 2 to about 40 percent.
Claim 13
Dependent Claim
22 words
The catalyst composition of claim 1 wherein the relative density of the copper substrate ranges from about 2 to about 10 percent.
Claim 14
Dependent Claim
21 words
The catalyst composition of claim 1, wherein the relative density of the zirconia ranges from about 2 to about 20 percent.
Claim 15
Dependent Claim
15 words
The catalyst composition of claim 1, wherein the zirconia is stabilized with an inorganic oxide.
Claim 16
Dependent Claim
12 words
The catalyst composition of claim 14, wherein the inorganic oxide is yttria.
Claim 17
Dependent Claim
59 words
The catalyst composition of claim 1, wherein component (a) is prepared by a process comprising: (i) etching the copper substrate in a solution of ammonium hydroxide; (ii) rinsing the etched copper substrate with water, and subsequently (iii) treating it with a solution of a soluble silver salt to deposit an adherent coating of metallic silver on said copper substrate.
Claim 18
Dependent Claim
39 words
The catalyst composition of claim 1, wherein component (b) is prepared by impregnating the zirconia with a permanganate solution, removing excess solution from the impregnated zirconia and heating said impregnated zirconia to convert the permanganate to oxides of manganese.
Claim 19
Dependent Claim
21 words
The catalyst composition of claim 17, wherein said heating step is conducted during the use of the catalyst for ozone removal.
Claim 20
Dependent Claim
38 words
A catalytic device for ozone removal which comprises alternate layers of (a) metallic silver deposited on a relatively high surface area copper substrate and (b) a composite of a relatively high surface area zirconia and oxides of manganese.
Claim 21
Dependent Claim
38 words
A catalytic device for ozone removal which comprises alternate layers of (a) metallic silver deposited on a relatively high surface area copper substrate and (b) a composite of a relatively high surface area zirconia and oxides of manganese.
Claim 22
Dependent Claim
16 words
The catalytic device according to claim 19 wherein the alternate layers are arranged in laminar fashion.
Claim 23
Dependent Claim
16 words
The catalytic device according to claim 19 wherein the alternate layers are arranged in spiral fashion.
Claim 24
Dependent Claim
23 words
The catalytic device according to claim 19, wherein the copper substrate is a copper foam and the zirconia is a fibrous zirconia felt.
Claim 25
Dependent Claim
21 words
The catalytic device according to claim 19 wherein the substrate is a copper foam and the zirconia is a woven cloth.
Claim 26
Dependent Claim
61 words
The catalytic device according to claim 19 wherein the thickness of the silver deposit is between about 0.001 and about 10 mils, the concentration of the oxides of manganese is between about 0.1 and about 10 percent based on the weight of the zirconia, and the volumetric ratio of components (a) and (b) is maintained between about 1:2 and about 50:1.
References Cited (Backward Citations)
US3682585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-05 | 1983-05-07 | 1983-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-05 | 1987-05-07 | 1987-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-05 | 1991-05-07 | 1991-11-06 | $7700.00 | Window Closed / Lapsed |