US3890245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Procedure for increasing the chemisorption capacity of carbon with regard to gases
Assignee: Institute for Energy Technology
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Filing: 1973-07-11
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Granted: 1975-06-17
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Expires: 1993-07-11
Abstract
Abstract The present invention is related to a procedure for increasing the chemisorption capacity of carbon impregnated with metallic compounds. By a large number of tests it is amply demonstrated that such capacity may be significantly increased with regard to poisonous gases and gaseous industrial effluents simply by irradiating the impregnated carbon by gamma radiation to a dosage of at least 1 Mrad before the actual sorption process. The said chemisorption capacity may be further increased by performing the irradiation in a nitrogen atmosphere, preferably at a higher partial pressure of nitrogen than in air at atmospheric pressure.
Inventors
- 👤 Ronald Berg
- 👤 Hans Petter Hjermstad
- 👤 Gerard Albert Neefjes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:40
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/30; C01B32/312; C01B32/342; C01B32/348; C01B32/354; C01B32/36; C01B32/366
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
51 words
A PROCESS FOR INCREASING THE CHEMISORPTION CAPACITY OF CARBON COMPRISING: IMPREGNATING CARBON WITH A QUANTITY OF AT LEAST ONE METALLIC COMPOUND EFFECTIVE FOR INCREASING THE SORPTION CAPACITY OF THE CARBON; AND IRRADIATING SAID IMPREGNATED CARBON WITH A DOSAGE OF AT LEAST 1 MRAD OF GAMMA RADIATION IN THE PREENCE OF NITROGEN.
Claim 2
Dependent Claim
51 words
A PROCESS FOR INCREASING THE CHEMISORPTION CAPACITY OF CARBON COMPRISING: IMPREGNATING CARBON WITH A QUANTITY OF AT LEAST ONE METALLIC COMPOUND EFFECTIVE FOR INCREASING THE SORPTION CAPACITY OF THE CARBON; AND IRRADIATING SAID IMPREGNATED CARBON WITH A DOSAGE OF AT LEAST 1 MRAD OF GAMMA RADIATION IN THE PREENCE OF NITROGEN.
Claim 3
Dependent Claim
28 words
A process as set forth in claim 1 wherein said irradiating step is conducted in an atmosphere having a nitrogen partial pressure greater than air at atmospheric pressure.
References Cited (Backward Citations)
US3217032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |