US2733980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precipitation of sodium hexavanadate
Assignee: —
•
Filing: —
•
Granted: 1956-02-07
•
Expires: 1973-02-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:21
CPC Classifications
C; C01; C01G; C01G31/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN THE METHOD OF TREATING A VANADIUM ORE MATERIAL WHICH COMPRISES ROASTING SUCH ORE MATERIAL WITH SALT, WASHING THE ROASTED ORE MATERIAL WITH WATER TO DISSOLVE WATER-SOLUBLE VANADIUM COMPOUNDS AND PRECIPITATING A VANADATE FROM THE WASH LIQUOR BY THE ADDITION OF SULFURIC ACID THERETO, THE IMPROVEMENT WHICH COMPRISES RECIRCULATING SAID WASH LIQUOR THROUGH SAID ROASTED ORE MATERIAL UNTIL THE AGGREGATE CONCENTRATION OF SODIUM CHLORIDE AND SODIUM SULFATE IN SAID LIQUOR IS 5% TO 20% BY WEIGHT; HEATING SAID LIQUOR TO AN ELEVATED TEMPERATURE NOT ABOVE ITS BOILING POINT: AND ADDING SULFURIC ACID TO THE ENTIRE HOT SOLUTION UNTIL ITS PH IS ABOUT 2 TO 3. THEREBY PRECIPITATING SODIUM HEXAVANADATE FROM SUCH LIQUOR.
Claim 2
Dependent Claim
112 words
IN THE METHOD OF TREATING A VANADIUM ORE MATERIAL WHICH COMPRISES ROASTING SUCH ORE MATERIAL WITH SALT, WASHING THE ROASTED ORE MATERIAL WITH WATER TO DISSOLVE WATER-SOLUBLE VANADIUM COMPOUNDS AND PRECIPITATING A VANADATE FROM THE WASH LIQUOR BY THE ADDITION OF SULFURIC ACID THERETO, THE IMPROVEMENT WHICH COMPRISES RECIRCULATING SAID WASH LIQUOR THROUGH SAID ROASTED ORE MATERIAL UNTIL THE AGGREGATE CONCENTRATION OF SODIUM CHLORIDE AND SODIUM SULFATE IN SAID LIQUOR IS 5% TO 20% BY WEIGHT; HEATING SAID LIQUOR TO AN ELEVATED TEMPERATURE NOT ABOVE ITS BOILING POINT: AND ADDING SULFURIC ACID TO THE ENTIRE HOT SOLUTION UNTIL ITS PH IS ABOUT 2 TO 3. THEREBY PRECIPITATING SODIUM HEXAVANADATE FROM SUCH LIQUOR.
References Cited (Backward Citations)
US1393748A
Cited
US1392745A
Cited
US1531541A
Cited
US1554917A
Cited
US2479905A
Cited
US2551733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-06 | 1959-08-08 | 1960-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-06 | 1963-08-08 | 1964-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-06 | 1967-08-08 | 1968-02-07 | $7700.00 | Window Closed / Lapsed |