US4261805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for regenerating activated carbon
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1979-05-11
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Granted: 1981-04-14
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Expires: 1999-05-11
Abstract
Abstract The present invention provides a method for the continuous regeneration of activated carbon which has become loaded and deactivated subsequent to an aqueous filtration process, wherein organic chemical substances adsorbed on the activated carbon are oxidized and decomposed in the presence of water and oxygen by the action of hydroxide radicals. Hydroxide radicals are produced in the water by means of x-radiation in the range of from about 50 keV to about 800 keV, preferably in the energy range from about 100 keV to about 300 keV. An additional ultrasonic treatment may be employed to improve the effectiveness of the regeneration process. X-ray tube arrangements with tubular anodes are particularly suitable for use with the irradiation regeneration process.
Inventors
- 👤 Joseph Galliker
- 👤 Fritz Munzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:08
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/125; B01J20/00; B01J20/30; B01J20/34; B01J20/3441; C; C01; C01B; C01B32/00; C01B32/30; C01B32/354; C01B32/36; C01B32/366; C02; C02F; C02F1/00; C02F1/30; G; G21; G21K; G21K5/00; G21K5/02; H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/12; H01J35/13; C02F1/28; C02F1/283; C02F1/34; C02F1/36; C02F2303/00; C02F2303/16
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
52 words
A method of regenerating activated carbon having organic chemical substances adsorbed thereon comprising irradiating said activated carbon with X-radiation in the presence of water and oxygen with energy sufficient to cause hydroxide radicals to be formed which aid in the regeneration of said activated carbon by oxidation of said organic chemical substances.
Claim 2
Independent Claim
52 words
A method of regenerating activated carbon having organic chemical substances adsorbed thereon comprising irradiating said activated carbon with X-radiation in the presence of water and oxygen with energy sufficient to cause hydroxide radicals to be formed which aid in the regeneration of said activated carbon by oxidation of said organic chemical substances.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein said activated carbon is irradiated with X-radiation in the energy range of from about 50 keV to about 800 keV.
Claim 4
Dependent Claim
26 words
The method of claim 2 wherein said activated carbon is irradiated with X-radiation in the energy range of from about 100 keV to about 300 keV.
Claim 5
Dependent Claim
26 words
The method of claim 2 wherein said activated carbon is irradiated with X-radiation in the energy range of from about 5 kGy to about 15 kGy.
Claim 6
Dependent Claim
20 words
The method of claim 1 wherein said activated carbon is additionally irradiated with ultrasonic irradiation in the presence of water.
Claim 7
Dependent Claim
15 words
The method of claim 5 wherein said ultrasonic treatment is subsequent to said irradiation step.
Claim 8
Dependent Claim
30 words
The method of claim 1 wherein said organic chemical substances are adsorbed on said activated carbon during filtration in a filter, and the activated carbon is irradiated in said filter.
Claim 9
Dependent Claim
36 words
The method of claim 1 wherein said organic chemical substances are adsorbed on said activated carbon during filtration in a filter, and the activated carbon is removed from the filter, irradiated, and returned to the filter.
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) | 1984-04-13 | 1984-10-13 | 1985-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-13 | 1988-10-13 | 1989-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-13 | 1992-10-13 | 1993-04-14 | $7700.00 | Window Closed / Lapsed |