Patent US3734696A successfully refreshed from Google Patents.
US3734696A
Expired / Lapsed
US
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Vanadium recovery from acidic solutions
Assignee: Kerr McGee Corp
•
Filing: 1970-09-04
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Granted: 1973-05-22
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Expires: 1990-09-04
Abstract
Abstract A method for the extraction of vanadium (V) from acidic mixtures containing fluoride comprising effecting the extraction with amines in a water-immiscible organic solvent, the vanadium being complexed with the extractant and being extracted into the organic phase.
Inventors
- 👤 M Lucid
- 👤 W Leaders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:37
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/20; C22B34/22; C01; C01G; C01G31/00; C01G31/003
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
17 words
A process as set forth in claim 1 wherein said acidic solution is wet process phosphoric acid.
Claim 2
Dependent Claim
25 words
A process as set forth in claim 1 in which the amine is selected from the group consisting of primary, secondary, tertiary and quaternary amines.
Claim 3
Dependent Claim
28 words
A process as set forth in claim 1 wherein said fluoride is present in said acidic solution in an amount of about 0.25 mole per mole of vanadium.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |