Patent US4040802A successfully refreshed from Google Patents.
US4040802A
Expired / Lapsed
US
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Activation of water soluble amines by halogens for trapping methyl radioactive iodine from air streams
Assignee: Individual
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Filing: 1975-04-22
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Granted: 1977-08-09
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Expires: 1995-04-22
Abstract
Abstract Gas adsorbent charcoals impregnated with an aqueous solution of the reaction product of a tertiary amine and elemental iodine or bromine are better than 99 per cent efficient in trapping methyl iodine 131 . The chemical addition of iodine or bromine to the tertiary amine molecule increases the efficiency of the impregnated charcoal as a trapping agent, and in conjunction with the high flash point of the tertiary amine raises the ignition temperature of the impregnated charcoal.
Inventors
- 👤 Victor R. Deitz
- 👤 Charles H. Blachly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:11
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/02; B; B01; B01D; B01D53/00; B01D53/02; B01J; B01J20/00; B01J20/02; B01J20/20; B01J20/30; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3231; B01J20/3242; B01J20/3244; B01J20/3246; B01J20/3248; B01J20/3251; B01J20/3255
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
In the method of removing methyl iodine 131 gas from the effluent of a reactor by passing the effluent gas through an organic impregnated charcoal, the improvement comprising employing an impregnated charcoal prepared by contacting charcoal with an aqueous mixture of a halogen selected from the group consisting of iodine and bromine, and a tertiary amine selected from the group consisting of hexamethylenetetramine, triethyanolamine, triethylenediamine, N-methylmorpholine, N, N, N', N'-tetramethylethylenediamine, 1, dimethylamino-2-propanol, N-methylpiperazine, and N, N, N', N'-tetramethyl-1,4-butanediamine, wherein the concentration of halogen in the charcoal is between 0.4 and 1.6%, and the concentration of tertiary amine in the charcoal is between 2 and 7%, based on the weight of the charcoal.
Claim 2
Dependent Claim
112 words
In the method of removing methyl iodine 131 gas from the effluent of a reactor by passing the effluent gas through an organic impregnated charcoal, the improvement comprising employing an impregnated charcoal prepared by contacting charcoal with an aqueous mixture of a halogen selected from the group consisting of iodine and bromine, and a tertiary amine selected from the group consisting of hexamethylenetetramine, triethyanolamine, triethylenediamine, N-methylmorpholine, N, N, N', N'-tetramethylethylenediamine, 1, dimethylamino-2-propanol, N-methylpiperazine, and N, N, N', N'-tetramethyl-1,4-butanediamine, wherein the concentration of halogen in the charcoal is between 0.4 and 1.6%, and the concentration of tertiary amine in the charcoal is between 2 and 7%, based on the weight of the charcoal.
References Cited (Backward Citations)
US3453807A
Cited
US3429103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |