US4277362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating radioactively contaminated solvent waste
Assignee: Forschungszentrum Jülich
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Filing: 1978-06-27
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Granted: 1981-07-07
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Expires: 1998-06-27
Abstract
Abstract A method of and apparatus for treating radioactively contaminated solvent ste. The solvent waste is supplied to material such as peat, vermiculite, diaton, etc. This material effects the distribution or dispersion of the solvent and absorbs the foreign substances found in the solvent waste. Air or an inert gas flows through the material in order to pick up the solvent portions which are volatile as a consequence of their vapor pressure. The thus formed gas mixture, which includes air or inert gas and solvent portions, is purified in a known manner by thermal, electrical, or catalytic combustion of the solvent portions.
Inventors
- 👤 Heinz Mallek
- 👤 Werner Jablonski
- 👤 Willi Plum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:18
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/04; G21F9/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
A method of treating radioactively contaminated solvent waste including foreign substances and solvent portions which are volatile, which includes the steps of: supplying said solvent waste to a first absorbent material which effects dispersion of the solvent and absorption of the foreign substances found in said solvent waste; passing a gas selected from the group consisting of air and inert gas through said first absorbent material to pick up solvent portions which are volatile as a consequence of their vapor pressure so as to form a gas mixture; and purifying said gas mixture by combustion of said solvent portions.
Claim 2
Independent Claim
99 words
A method of treating radioactively contaminated solvent waste including foreign substances and solvent portions which are volatile, which includes the steps of: supplying said solvent waste to a first absorbent material which effects dispersion of the solvent and absorption of the foreign substances found in said solvent waste; passing a gas selected from the group consisting of air and inert gas through said first absorbent material to pick up solvent portions which are volatile as a consequence of their vapor pressure so as to form a gas mixture; and purifying said gas mixture by combustion of said solvent portions.
Claim 3
Dependent Claim
23 words
A method according to claim 1, in which said first absorbent material is selected from the group consisting of peat, vermiculite, and diaton.
Claim 4
Dependent Claim
22 words
A method according to claim 1, in which said combustion is selected from the group consisting of thermal, electrical, and catalytic combustion.
Claim 5
Dependent Claim
20 words
A method according to claim 1, which includes the step of heating said first material to 30° to 50° C.
Claim 6
Dependent Claim
25 words
A method according to claim 1, which includes the step of adding a further material to said first absorbent material to bind said foreign substances.
Claim 7
Dependent Claim
14 words
A method according to claim 5, in which said further material comprises ion exchangers.
Claim 8
Dependent Claim
22 words
A method according to claim 1, which includes the step of adding air to said gas mixture prior to the combustion thereof.
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) | 1984-07-06 | 1985-01-05 | 1985-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-06 | 1989-01-05 | 1989-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-06 | 1993-01-05 | 1993-07-07 | $7700.00 | Window Closed / Lapsed |