Patent JPH01246884A successfully refreshed from Google Patents.
US3821091A
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Method of separating plutonium from uranium and from other transuranium elements
Assignee: Hahn Meitner Institut Berlin GmbH
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Filing: 1972-07-25
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Granted: 1974-06-28
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Expires: 1992-07-25
Abstract
Abstract Plutonium is separated from uranium and other transuranium elements by subjecting an aqueous solution in dilute nitric acid of the elements to be separated to electrolytic extraction by counter-current or cross-current ion migration in the presence of a complexing agent, preferably acetic acid or a mixture of hydrofluoric acid with an alkali metal fluoride, until plutonium and the other elements present accumulate in separate portions of the solution which are thereafter separately withdrawn.
Inventors
- 👤 A Bilal
- 👤 K Metscher
- 👤 K Zimen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:16
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/04; G; G21; G21C; G21C19/00; G21C19/42; G21C19/44; G21C19/46; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y02W; Y02W30/00; Y02W30/50
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
21 words
A method as set forth in claim 1, wherein said solution is caused to flow in the direction of said current.
Claim 2
Dependent Claim
14 words
said solution being not more than one-normal with respect to said nitric acid, and
Claim 3
Dependent Claim
16 words
said complexing agent being acetic acid or a mixture of alkali metal fluoride and hydrofluoric acid.
Claim 4
Dependent Claim
19 words
A method as set forth in claim 1, wherein said solution is caused to flow transversely to said current.
Claim 5
Dependent Claim
22 words
A method as set forth in claim 1, wherein said solution is 0.02-normal to 0.6 normal with respect to said nitric acid.
Claim 6
Dependent Claim
21 words
A method as set forth in claim 4, wherein said solution is 0.05-normal to 0.2-normal with respect to said nitric acid.
Claim 7
Dependent Claim
28 words
A method as set forth in claim 4, wherein said complexing agent is acetic acid, and said solution is 0.5-normal to 4-normal with respect to said acetic acid.
Claim 8
Dependent Claim
28 words
A method as set forth in claim 4, wherein said complexing agent is acetic acid, and said solution is 1.5-normal to 2.5-normal with respect to said acetic acid.
Claim 9
Dependent Claim
46 words
A method as set forth in claim 4, wherein said complexing agent is a mixture of alkali metal fluoride and hydrofluoric acid, and said solution is 0.02-normal to 0.5-normal with respect to said hydrofluoric acid and 0.04-normal to 1-normal with respect to said alkali metal fluoride.
Claim 10
Dependent Claim
46 words
A method as set forth in claim 4, wherein said complexing agent is a mixture of alkali metal fluoride and hydrofluoric acid, and said solution is 0.05-normal to 0.2-normal with respect to said hydrofluoric acid, and 0.1-normal to 0.3-normal with respect to said alkali metal fluoride.
Claim 11
Dependent Claim
59 words
A method as set forth in claim 1, wherein said solution is prepared by dissolving a solid body containing said plutonium and said at least one member in an excess of nitric acid, and by removing said excess by reaction with a reducing agent, said reducing agent being converted to a gaseous oxidation product by reaction with said excess.
Claim 12
Dependent Claim
17 words
A method as set forth in claim 10, wherein said reducing agent is formic acid or formaldehyde.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |