Patent US4455236A successfully refreshed from Google Patents.
US4455236A
Expired / Lapsed
US
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Method for removing hydrogen sulfide from aqueous streams
Assignee: General Electric Co
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Filing: 1982-12-20
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Granted: 1984-06-19
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Expires: 2002-12-20
Abstract
Abstract Waste water containing dissolved hydrogen sulfide is passed through a vessel containing redox resin which oxidizes the dissolved hydrogen sulfide to elemental sulfur which is removed from the waste water, preferably through filtration. The method of the present invention is also particularly desirable in that the redox-active resin may be restored to a high oxidation state by contacting the resin with an oxidizing fluid such as humidified air or oxygen. The restoration of the redox-active resin is particularly easy when the resin is disposed within a vessel as a membrane dividing the interior volume of the vessel into separate chambers: one chamber for the passage of the waste water and the other chamber for the passage of oxidizing fluid.
Inventors
- 👤 Bang M. Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:20
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/06; B; B01; B01J; B01J47/00; B01J47/015; C02; C02F; C02F1/00; C02F1/72; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/916
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
91 words
A method for removing hydrogen sulfide from waste water and other aqueous solutions, comprising: passing said solution through a vessel containing at least one redox resin material having a high oxidation state, so as to contact said solution with said resin material said redox resin material comprising a membrane dividing said vessel into two volumes said solution being passed through a first of said volumes; passing an oxygenated fluid through the second of said volumes so as to contact said membrane and to increase the oxidation state of said redox resin.
Claim 2
Independent Claim
91 words
A method for removing hydrogen sulfide from waste water and other aqueous solutions, comprising: passing said solution through a vessel containing at least one redox resin material having a high oxidation state, so as to contact said solution with said resin material said redox resin material comprising a membrane dividing said vessel into two volumes said solution being passed through a first of said volumes; passing an oxygenated fluid through the second of said volumes so as to contact said membrane and to increase the oxidation state of said redox resin.
Claim 3
Dependent Claim
20 words
The method of claim 1 further including the step of: separating elemental sulfur from the solution passed through said vessel.
Claim 4
Dependent Claim
14 words
The method of claim 2 in which said elemental sulfur is removed by filtration.
Claim 5
Dependent Claim
22 words
The method of claim 1 in which said oxidizing fluid is selected from the group consisting of humidified air and humidified oxygen.
Claim 6
Dependent Claim
26 words
The method of claim 1 in which said redox resin comprises polymerized redox-active material selected from the group consisting of vinylhydroquinones, quinones, benzoquinones, napthaquinones and anthraquinones.
Claim 7
Dependent Claim
22 words
The method of claim 1 in which said redox resin comprises a resin having polyvalent metal chelate ions attached to said resin.
Claim 8
Dependent Claim
26 words
The method of claim 6 in which said polyvalent metal chelate ions comprise a composition selected from the group consisting of ferric/EDTA, ferric/HEDTA, ferric/NTA and ferric/DPTA.
Claim 9
Independent Claim
78 words
A method for removing hydrogen sulfide from waste water and other aqueous solutions, comprising: passing said solution through a vessel containing at least one redox resin material having a high oxidation state, so as to contact said solution with said resin material; ceasing the flow of solution through said vessel; and regenerating said redox resin material by passing an oxidizing fluid through said vessel, said fluid being selected from the group consisting of humidified air and humidified oxygen.
Claim 10
Independent Claim
78 words
A method for removing hydrogen sulfide from waste water and other aqueous solutions, comprising: passing said solution through a vessel containing at least one redox resin material having a high oxidation state, so as to contact said solution with said resin material; ceasing the flow of solution through said vessel; and regenerating said redox resin material by passing an oxidizing fluid through said vessel, said fluid being selected from the group consisting of humidified air and humidified oxygen.
Claim 11
Dependent Claim
22 words
The method of claim 8 in which said redox resin material is disposed in the form of pellets contained within said vessel.
Claim 12
Dependent Claim
30 words
The method of claim 8 further including the step of simultaneously, with said passing step, passing an oxidizing fluid through said vessel so as to contact said redox resin material.
Claim 13
Independent Claim
75 words
A method for removing hydrogen sulfide from waste water and other aqueous solutions, comprising: passing said solution through a vessel containing at least one redox resin material having a high oxidation state, so as to contact said solution with said resin material; and simultaneously with said passing step, regenerating said redox resin material by passing an oxidizing fluid through said vessel, said fluid being selected from the group consisting of humidified air and humidified oxygen.
Claim 14
Independent Claim
75 words
A method for removing hydrogen sulfide from waste water and other aqueous solutions, comprising: passing said solution through a vessel containing at least one redox resin material having a high oxidation state, so as to contact said solution with said resin material; and simultaneously with said passing step, regenerating said redox resin material by passing an oxidizing fluid through said vessel, said fluid being selected from the group consisting of humidified air and humidified oxygen.
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) | 1987-06-19 | 1987-12-19 | 1988-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-19 | 1991-12-19 | 1992-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-19 | 1995-12-19 | 1996-06-19 | $7700.00 | Window Closed / Lapsed |