US3190720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the selective recovery of vanadium oxide from alkaline liquors
Assignee: KERR MC GEE OIL IND Inc
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Filing: 1963-11-22
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Granted: 1965-06-22
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Expires: 1983-11-22
Abstract
No abstract record available.
Inventors
- 👤 Mayer B Goren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:43
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/20; C22B34/22; C01; C01G; C01G31/00; C01G31/02; C01P; C01P2004/00; C01P2004/10; C01P2004/30; C01P2006/00; C01P2006/60; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A PROCESS FOR THE PREPARATION OF A VANADIUM OXIDE PRODUCT FROM AN ALKALINE LIQUOR CONTAINING DISSOLVED VANADIUM VALUES AND DISSOLVED PHOSPHORUS VALUES AS A CONTAMINATING IMPURITY COMPRISING PRECIPITATING THE VANADIUM OXIDE PRODUCT FROM THE LIQUOR AT A PH OF ABOUT 0.5-1.7 AND A TEMPERATURE BETWEEN ABOUT 60*C. AND THE BOILING POINT OF THE LIQUOR, THE PH OF THE LIQUOR BEING ADJUSTED BY ADDITION OF AN ACIFIC SUBSTANCE TO PROVIDE A PH OF ABOUT 0.5-1.7, THE PH OF THE LIQUOR BEING ADJUSTED RAPIDILY AND IN THE MATTER OF NOT MORE THATN A FEW MINUTES WHEN PASSING THROUGH THE PH RANGE OF ABOUT 3 1/2 TO BELOW 2 TO THEREBY INHIBIT THE PRECIPITATION OF RED CAKE, THE VANADIUM VALUES BEING SUBSTANTIALLY ALL IN THE QUINQUEVALENT STATE DURING PRECIPITATION OF THE VANADIUM OXIDE PRODUCT AND THE FOREGOING PH LIMITS BEING BASED UPON THE PH VALUE OF THE LIQUOR AT A TEMPERATURE OF 25*C.
Claim 2
Dependent Claim
150 words
A PROCESS FOR THE PREPARATION OF A VANADIUM OXIDE PRODUCT FROM AN ALKALINE LIQUOR CONTAINING DISSOLVED VANADIUM VALUES AND DISSOLVED PHOSPHORUS VALUES AS A CONTAMINATING IMPURITY COMPRISING PRECIPITATING THE VANADIUM OXIDE PRODUCT FROM THE LIQUOR AT A PH OF ABOUT 0.5-1.7 AND A TEMPERATURE BETWEEN ABOUT 60*C. AND THE BOILING POINT OF THE LIQUOR, THE PH OF THE LIQUOR BEING ADJUSTED BY ADDITION OF AN ACIFIC SUBSTANCE TO PROVIDE A PH OF ABOUT 0.5-1.7, THE PH OF THE LIQUOR BEING ADJUSTED RAPIDILY AND IN THE MATTER OF NOT MORE THATN A FEW MINUTES WHEN PASSING THROUGH THE PH RANGE OF ABOUT 3 1/2 TO BELOW 2 TO THEREBY INHIBIT THE PRECIPITATION OF RED CAKE, THE VANADIUM VALUES BEING SUBSTANTIALLY ALL IN THE QUINQUEVALENT STATE DURING PRECIPITATION OF THE VANADIUM OXIDE PRODUCT AND THE FOREGOING PH LIMITS BEING BASED UPON THE PH VALUE OF THE LIQUOR AT A TEMPERATURE OF 25*C.
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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |