Patent US5122274A successfully refreshed from Google Patents.
US5122274A
Expired / Lapsed
US
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Method of treating fluids
Assignee: KDF Fluid Treatment Inc
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Filing: 1991-04-12
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Granted: 1992-06-16
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Expires: 2011-04-12
Abstract
Abstract A method for treating fluid to remove hydrogen sulfide and sulfur dioxide is disclosed. The method includes passing fluid containing the hydrogen sulfide and/or sulfur dioxide through a bed of metal particulate matter. The metal particulate matter is preferably chosen from metals having favorable redox potentials relative to the redox potentials of these undesirable constituents so as to establish conditions for spontaneous oxidation and reduction reactions between the undesirable constituents and the metal particles.
Inventors
- 👤 Don E. Heskett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:44
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/70; C02F1/705; C02F1/001; C02F1/28; C02F1/283; C02F1/42; C02F1/66; C02F2101/00; C02F2101/10; C02F2101/101; C02F2101/103; C02F2201/00; C02F2201/002; C02F2201/006; C02F2303/00; C02F2303/02; C02F2303/18; C02F2303/185
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
102 words
A long lived low maintenance method for reducing the concentration of undesirable inorganic hydrogen sulfide which is present in drinkable water, said hydrogen sulfide having a first redox potential, said method comprising passing said water containing said hydrogen sulfide through a bed of metal particles, said metal particles comprising copper and zinc, said metal particles having a sufficient surface area and a second redox potential such that relative to said first redox potential conditions are established for spontaneous inorganic oxidation and reduction reactions between said undesirable hydrogen sulfide and said metal particles when said fluid is in contact with said metal particles.
Claim 2
Dependent Claim
102 words
A long lived low maintenance method for reducing the concentration of undesirable inorganic hydrogen sulfide which is present in drinkable water, said hydrogen sulfide having a first redox potential, said method comprising passing said water containing said hydrogen sulfide through a bed of metal particles, said metal particles comprising copper and zinc, said metal particles having a sufficient surface area and a second redox potential such that relative to said first redox potential conditions are established for spontaneous inorganic oxidation and reduction reactions between said undesirable hydrogen sulfide and said metal particles when said fluid is in contact with said metal particles.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein said metal particles comprising copper and zinc is an alloy.
Claim 4
Dependent Claim
12 words
The method of claim 2 wherein said alloy is a brass alloy.
Claim 5
Dependent Claim
15 words
The method of claim 1 wherein said metal particles are sintered into a porous body.
Claim 6
Dependent Claim
27 words
The method of claim 1 wherein said metal particles have a mesh size ranging from about 4 to about 400 mesh based on U.S. Standard screen sizes.
Claim 7
Dependent Claim
17 words
The method of claim 5 wherein said mesh size ranges; from about 4 to about 30 mesh.
Claim 8
Dependent Claim
18 words
The method of claim 1 wherein said fluid is water and said metal particles are brass metal particles.
Claim 9
Dependent Claim
39 words
The method of claim 1 wherein said fluid is water and said method further comprises the step of adjusting the pH of said water to a desired level prior to passing said fluid through said bed of metal particles.
Claim 10
Dependent Claim
19 words
The method of claim 1 wherein said method further comprises the step of supplying oxygen to said metal particles.
Claim 11
Dependent Claim
16 words
The method of claim 9 wherein said oxygen is supplied to said metal particles by aeration.
Claim 12
Dependent Claim
42 words
The method of claim 1 wherein said fluid is water and said method further comprises the step of passing said treated fluid through a conventional treatment process selected from the group consisting of activated carbon, ion-exchange, and reverse osmosis conventional treatment processes.
Claim 13
Dependent Claim
26 words
The method of claim 1 wherein said fluid is water and said method further comprises the step of passing said treated fluid through a filtration medium.
Claim 14
Dependent Claim
11 words
The method of claim 12 wherein said filtration medium is sand.
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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) | 1995-06-16 | 1995-12-16 | 1996-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-16 | 1999-12-16 | 2000-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-16 | 2003-12-16 | 2004-06-16 | $7700.00 | Window Closed / Lapsed |