US4849114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of toxic compounds in water
Assignee: US Filter Zimpro Inc
•
Filing: 1988-03-04
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Granted: 1989-07-18
•
Expires: 2008-03-04
Abstract
Abstract A method of oxidizing toxic compounds including halogenated and/or partially oxygenated hydrocarbons and hydrazine and hydrazine derivatives in aqueous solutions by using in combination ozone, hydrogen peroxide and ultraviolet radiation is improved.
Inventors
- 👤 Jack D. Zeff
- 👤 Eriks Leitis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:26
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/722; C02F1/30; C02F1/32; C02F1/78
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
43 words
A method for oxidizing halogenated and/or partially oxygenated hydrocarbon constituents and/or hydrazine and hydrazine derivatives in aqueous solution comprising simultaneously exposing said aqueous solution to an amount of ozone, hydrogen peroxide and ultraviolet radiation sufficient to substantially reduce said constituents in the solution.
Claim 2
Independent Claim
43 words
A method for oxidizing halogenated and/or partially oxygenated hydrocarbon constituents and/or hydrazine and hydrazine derivatives in aqueous solution comprising simultaneously exposing said aqueous solution to an amount of ozone, hydrogen peroxide and ultraviolet radiation sufficient to substantially reduce said constituents in the solution.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said aqueous solution is ground water.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein said aqueous solution is industrial waste water.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein said aqueous solution is drinking water.
Claim 6
Dependent Claim
11 words
The method of claim 1 wherein said constituents are methylene chloride.
Claim 7
Dependent Claim
10 words
The method of claim 1 wherein said constituents are methanol.
Claim 8
Dependent Claim
27 words
The method of claim 1 wherein said method further comprises elevating the temperature of said aqueous solution during exposure to said ozone, hydrogen peroxide and ultraviolet light.
Claim 9
Dependent Claim
21 words
The method of claim 1 wherein said hydrazine derivatives are selected from the group consisting of monomethylhydrazine, unsymmetrical dimethylhydrazine and dimethylnitrosamine.
Claim 10
Dependent Claim
35 words
The method of claim 1 wherein hydrazine and hydrazine derivatives are oxidized and the aqueous solution is exposed to hydrogen peroxide, ozone and ultraviolet radiation in a molar ratio of 1:1 hydrogen peroxide to ozone.
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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) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |