Patent US4330509A successfully refreshed from Google Patents.
US4330509A
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US
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Separation of zirconium and uranium
Assignee: United States, OF INTERIOR, Secretary of
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Filing: 1981-05-22
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Granted: 1982-05-18
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Expires: 2001-05-22
Abstract
Abstract Zirconium is selectively precipitated from aqueous solutions containing zirconium and uranium by treatment with a precipitant consisting of tartaric acid or a tartrate.
Inventors
- 👤 Helen G. Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:59
CPC Classifications
C; C01; C01G; C01G25/00; C01G25/003; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/32; C07; C07C; C07C51/00; C07C51/41; C07C51/412; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
62 words
A method for separation and recovery of zirconium from a feed consisting of an aqueous solution of zirconium and uranium having a pH of about 0.2 to 1.0 comprising treatment of the solution with a precipitant consisting of tartaric acid or a tartrate, the amount of said precipitant being sufficient to selectively precipitate zirconium as a tartrate with minimal precipitation of uranium.
Claim 2
Independent Claim
62 words
A method for separation and recovery of zirconium from a feed consisting of an aqueous solution of zirconium and uranium having a pH of about 0.2 to 1.0 comprising treatment of the solution with a precipitant consisting of tartaric acid or a tartrate, the amount of said precipitant being sufficient to selectively precipitate zirconium as a tartrate with minimal precipitation of uranium.
Claim 3
Dependent Claim
12 words
The method of claim 1 in which the precipitant is tartaric acid.
Claim 4
Dependent Claim
12 words
The method of claim 1 in which the precipitant is ammonium tartrate.
Claim 5
Dependent Claim
27 words
The method of claim 1 in which the feed solution consists of a strip liquor from a solvent extraction process for recovery of zirconium from zircon sands.
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) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |