Patent US3372982A successfully refreshed from Google Patents.
US3372982A
Expired / Lapsed
US
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Method of recovery of vanadium from its ores
Assignee: Hazen Research Inc
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Filing: 1963-03-01
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Granted: 1968-03-12
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Expires: 1983-03-01
Abstract
No abstract record available.
Inventors
- 👤 Wayne C Hazen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:23
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/20; C22B34/22; C01; C01G; C01G31/00; C01G31/003
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
88 words
A PROCESS FOR THE RECOVERY OF VANADIUM FROM ITS ORES WHICH COMPRISES: TREATING THE ORE WITH A SOLVENT TO BRING THE VANADIUM INTO SOLUTION; OXIDIZING THE VANADIUM IN SOLUTION TO THE PENTAVALENT STAE; ADJUSTING THE PH OF THE SOLUTION TO A VALUE BETWEEN ABOUT 1 AND ABOUT 6; CONTACTING THE SOLUTION WITH CHARCOAL TO ADSORB THE VANADIUM; STRIPPING THE ADSORBED VANADIUM FROM THE CHARCOAL WITH A SOLVENT FOR THE VANADIUM TO FORM A SUBSTANTIALLY PURE SOLUTION OF VANADIUM AND RECOVERING THE VANADIUM FROM THE STRIPPING SOLUTION BY PRECIPITATION.
Claim 2
Dependent Claim
88 words
A PROCESS FOR THE RECOVERY OF VANADIUM FROM ITS ORES WHICH COMPRISES: TREATING THE ORE WITH A SOLVENT TO BRING THE VANADIUM INTO SOLUTION; OXIDIZING THE VANADIUM IN SOLUTION TO THE PENTAVALENT STAE; ADJUSTING THE PH OF THE SOLUTION TO A VALUE BETWEEN ABOUT 1 AND ABOUT 6; CONTACTING THE SOLUTION WITH CHARCOAL TO ADSORB THE VANADIUM; STRIPPING THE ADSORBED VANADIUM FROM THE CHARCOAL WITH A SOLVENT FOR THE VANADIUM TO FORM A SUBSTANTIALLY PURE SOLUTION OF VANADIUM AND RECOVERING THE VANADIUM FROM THE STRIPPING SOLUTION BY PRECIPITATION.
Claim 3
Independent Claim
74 words
A METHOD FOR THE RECOVERY OF VANADIUM FROM SOLUTIONS CONTAINING VANADIUM IN THE PENTAVALENT STATE WHICH COMPRISES ADJUSTING THE PH OF THE SOLUTION TO A VALUE BETWEEN ABOUT 1 AND ABOUT 6; CONTACTING THE SOLUTION WITH CHARCOAL TO ADSORB THE VANADIUM ON THE CHARCOAL; STRIPPING THE VANADIUM FROM THE CHARCOAL WITH A SOLVENT FOR THE VANADIUM TO FORM A RELATIVELY PURE SOLUTION OF VANADIUM; AND RECOVERING THE VANADIUM FROM THE STRIP SOLUTION BY PRECIPITATION.
Claim 4
Independent Claim
74 words
A METHOD FOR THE RECOVERY OF VANADIUM FROM SOLUTIONS CONTAINING VANADIUM IN THE PENTAVALENT STATE WHICH COMPRISES ADJUSTING THE PH OF THE SOLUTION TO A VALUE BETWEEN ABOUT 1 AND ABOUT 6; CONTACTING THE SOLUTION WITH CHARCOAL TO ADSORB THE VANADIUM ON THE CHARCOAL; STRIPPING THE VANADIUM FROM THE CHARCOAL WITH A SOLVENT FOR THE VANADIUM TO FORM A RELATIVELY PURE SOLUTION OF VANADIUM; AND RECOVERING THE VANADIUM FROM THE STRIP SOLUTION BY PRECIPITATION.
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) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |