US4459269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removing ozone from dilute concentrations in air at room temperatures
Assignee: Water Pik Inc
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Filing: 1983-06-29
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Granted: 1984-07-10
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Expires: 2003-06-29
Abstract
Abstract Ozone is catalytically removed from air at room temperatures. Air containing ozone in dilute concentrations is contacted with a catalyst formed of a; palladium (II) salt such as palladium (II) chloride, a copper (II) slat such as copper (II) chloride and copper (II) sulfate, and a nickel (II) salt such as nickel (II) chloride, on an alumina substrate, at a temperature in the range of -20° C. to 85° C. The catalyst is formed by making a paste of particulate alumina and a palladium (II) halide containing impregnating solution and then drying the paste and activating the catalyst by heating.
Inventors
- 👤 Victor F. Zackay
- 👤 Donald R. Rowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:40
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8671
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
52 words
The method of removing ozone from dilute concentrations thereof in air comprising contacting the ozone and air mixture with a catalyst, comprising a palladium (II) salt and a copper (II) salt on a substrate, at a temperature in the range of about -20° C. to about 85° C. to decompose the ozone.
Claim 2
Independent Claim
52 words
The method of removing ozone from dilute concentrations thereof in air comprising contacting the ozone and air mixture with a catalyst, comprising a palladium (II) salt and a copper (II) salt on a substrate, at a temperature in the range of about -20° C. to about 85° C. to decompose the ozone.
Claim 3
Independent Claim
98 words
The method of removing ozone from dilute concentrations thereof in air comprising contacting the ozone and air mixture with a catalyst, comprising a palladium (II) salt and a copper (II) salt on a particular substrate, said catalyst being formed by mixing a paste of the substrate and a solution of the palladium (II) salt and copper (II) salt and drying said paste to provide a palladium (II) and copper (II) salt catalyst for contact with the ozone and air mixture at a temperature in the range of about -20° C. to about 85° C. to decompose the ozone.
Claim 4
Independent Claim
98 words
The method of removing ozone from dilute concentrations thereof in air comprising contacting the ozone and air mixture with a catalyst, comprising a palladium (II) salt and a copper (II) salt on a particular substrate, said catalyst being formed by mixing a paste of the substrate and a solution of the palladium (II) salt and copper (II) salt and drying said paste to provide a palladium (II) and copper (II) salt catalyst for contact with the ozone and air mixture at a temperature in the range of about -20° C. to about 85° C. to decompose the ozone.
Claim 5
Dependent Claim
23 words
The method defined in claim 2 wherein the palladium (II) salt is present in amounts up to about 0.08 gram-moles/liter of impregnating solution.
Claim 6
Dependent Claim
61 words
The method defined in claim 2 wherein the solution of palladium (II) salt and copper (II) salt includes a nickel (II) salt and the combined palladium (II) salt and nickel (II) salt are present in the amount of 0.080 gram-moles/liter of impregnating solution and the molar ratio of palladium (II) salt to nickel (II) salt is at least 1 to 7.
Claim 7
Independent Claim
125 words
The method of removing ozone from dilute concentrations thereof in air comprising contacting the ozone and air mixture with a dry catalyst, comprising a palladium (II) salt and a copper (II) salt on a substrate, said catalyst being formed by contacting the substrate with a solution of the palladium (II) salt in an amount sufficient to wet all particles of the substrate for a soak period of time less than about 4 hours, and thereafter removing any excess solution and drying the moist substrate and activating said catalyst by heating at a temperature of about 200° C., to provide a catalyst for contact with the ozone and air mixture, at a temperature of between about -20° C. and about 85° C. to decompose the ozone.
Claim 8
Independent Claim
125 words
The method of removing ozone from dilute concentrations thereof in air comprising contacting the ozone and air mixture with a dry catalyst, comprising a palladium (II) salt and a copper (II) salt on a substrate, said catalyst being formed by contacting the substrate with a solution of the palladium (II) salt in an amount sufficient to wet all particles of the substrate for a soak period of time less than about 4 hours, and thereafter removing any excess solution and drying the moist substrate and activating said catalyst by heating at a temperature of about 200° C., to provide a catalyst for contact with the ozone and air mixture, at a temperature of between about -20° C. and about 85° C. to decompose the ozone.
Claim 9
Dependent Claim
23 words
The method as defined in claim 5 wherein the soak period is in the range of about 1/2 hour to about 2 hours.
Claim 10
Dependent Claim
15 words
The method as defined in claim 5 wherein the soak period is about 1/2 hour.
Claim 11
Dependent Claim
11 words
The method defined in claim 1 wherein said salts are halides.
Claim 12
Dependent Claim
11 words
The method defined in claim 1 wherein said salts are chlorides.
Claim 13
Dependent Claim
26 words
The method defined in claim 1 where said palladium (II) salt is a chloride and said copper (II) salt is a mixture of chloride and sulfate.
Claim 14
Dependent Claim
32 words
The method of claim 4 wherein said palladium (II) salt is a chloride, said nickel (II) salt is a chloride and said copper (II) salt is a mixture of chloride and sulfate.
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) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |