Patent US4381287A successfully refreshed from Google Patents.
US4381287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of zirconium and uranium
Assignee: United States Department of the Interior
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Filing: 1982-03-30
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Granted: 1983-04-26
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Expires: 2002-03-30
Abstract
Abstract Zirconium- and uranium-containing hydrocarbon-amine solutions are treated for separation of zirconium and uranium by means of a process comprising: (1) selective stripping of zirconium with an aqueous chloride solution, and (2) scrubbing the resulting aqueous solution with chloride-loaded hydrocarbon-amine solution to selectively remove uranium, thereby yielding an aqueous zirconium solution of low uranium content.
Inventors
- 👤 David J. MacDonald
- 👤 Helen G. Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:18
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0252; C22B60/026; C01; C01G; C01G25/00; C01G25/003; C22B3/00; C22B3/20; C22B3/26; C22B3/28; C22B3/282; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
78 words
A process for separation of zirconium and uranium comprising: stripping a zirconium- and uranium-containing hydrocarbon-amine organic solution with an aqueous chloride solution, whereby zirconium is selectively extracted from the organic solution, with extraction of only minor amounts of uranium, and scrubbing the resulting zirconium- and uranium-containing aqueous solution with a chloride-loaded hydrocarbon-amine organic solution to selectively extract uranium, whereby the uranium content of the solution is further lowered to yield an aqueous zirconium solution substantially free of uranium.
Claim 2
Dependent Claim
78 words
A process for separation of zirconium and uranium comprising: stripping a zirconium- and uranium-containing hydrocarbon-amine organic solution with an aqueous chloride solution, whereby zirconium is selectively extracted from the organic solution, with extraction of only minor amounts of uranium, and scrubbing the resulting zirconium- and uranium-containing aqueous solution with a chloride-loaded hydrocarbon-amine organic solution to selectively extract uranium, whereby the uranium content of the solution is further lowered to yield an aqueous zirconium solution substantially free of uranium.
Claim 3
Dependent Claim
22 words
The process of claim 1 in which the hydrocarbon-amine organic solutions consist essentially of solutions of water-insoluble tertiary amines in hydrocarbon diluents.
Claim 4
Dependent Claim
21 words
The process of claim 1 in which the aqueous chloride solution comprises a solution of a chloride salt and hydrochloric acid.
Claim 5
Dependent Claim
13 words
The process of claim 3 in which the chloride salt is sodium chloride.
Claim 6
Dependent Claim
26 words
The process of claim 1 in which the product zirconium solution contains uranium in an amount of no more than about 3 ppm of the zirconium.
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) | 1986-04-25 | 1986-10-25 | 1987-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-25 | 1990-10-25 | 1991-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-25 | 1994-10-25 | 1995-04-26 | $7700.00 | Window Closed / Lapsed |