US4008136A
Expired / Lapsed
US
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Process for the treatment of waste water by heterogeneous photosensitized oxidation
Assignee: Temple University
•
Filing: 1974-08-09
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Granted: 1977-02-15
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Expires: 1994-08-09
Abstract
Abstract A composition and method for the oxidation of organic contaminants in waste water by subjection to heterogeneous photosensitized oxidation is disclosed.
Inventors
- 👤 John R. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:40
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; C02F1/30; C02F1/32; C02F1/725; Y; Y02; Y02W; Y02W10/00; Y02W10/30; Y02W10/37; Y10; Y10S; Y10S522/00; Y10S522/904
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
44 words
A process for treating aqueous waste effluents containing organic materials which comprises adding to said aqueous effluents in the presence of oxygen, a water insoluble polymer-based photosensitizer and then photolyzing the resulting suspension with light having wavelengths between 320 nm. and about 800 nm.
Claim 2
Dependent Claim
44 words
A process for treating aqueous waste effluents containing organic materials which comprises adding to said aqueous effluents in the presence of oxygen, a water insoluble polymer-based photosensitizer and then photolyzing the resulting suspension with light having wavelengths between 320 nm. and about 800 nm.
Claim 3
Dependent Claim
20 words
A process as claimed in claim 1 in which air is the oxygen source and daylight is the light source.
Claim 4
Dependent Claim
21 words
A process as claimed in claim 1 in which the polymer-based photosensitizer is an ion exchange resin containing a photosensitizing dye.
Claim 5
Dependent Claim
20 words
A process as claimed in claim 3 in which the polymer-based photosensitizer is an anionic exchange resin containing rose bengal.
Claim 6
Dependent Claim
20 words
A process as claimed in claim 3 in which the polymer-based photosensitizer is a cation exchange resin containing methylene blue.
Claim 7
Dependent Claim
23 words
A process as claimed in claim 3 in which the ion exchange resin containing a photosensitizing dye is attached to an inert support.
Claim 8
Dependent Claim
47 words
A process, as recited in claim 1, in which a heterogeneous mixture is formed of said aqueous waste effluent and said water insoluble polymer-based photo-sensitizer, said process further including the step of separating said treated waste effluent and said water insoluble polymer-based photosensitizer following said photolyzing treatment.
Claim 9
Dependent Claim
22 words
A process for generating singlet oxygen which comprises photolyzing a water insoluble polymer-based photosensitizer with visible light in the presence of oxygen.
Claim 10
Dependent Claim
22 words
A process for generating singlet oxygen which comprises photolyzing a water insoluble polymer-based photosensitizer with visible light in the presence of oxygen.
Claim 11
Dependent Claim
21 words
A process as claimed in claim 8 in which the polymer-based photosensitizer is an ion exchange resin containing a photosensitizing dye.
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) | 1980-02-15 | 1980-08-16 | 1981-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-15 | 1984-08-16 | 1985-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-15 | 1988-08-16 | 1989-02-15 | $7700.00 | Window Closed / Lapsed |