Patent US2662809A successfully refreshed from Google Patents.
US2662809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recovering lithium compounds from lithium minerals
Assignee: CIE GEOL ET MINIERE DES INGENI
•
Filing: 1950-05-01
•
Granted: 1953-12-15
•
Expires: 1970-05-01
Abstract
No abstract record available.
Inventors
- 👤 Kroll Adolphe Victor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:26
CPC Classifications
C; C22; C22B; C22B26/00; C22B26/10; C22B26/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A METHOD OF RECOVERING LITHIUM FROM ITS ALUMINUM AND SILICATE CONTAINING ORES COMPRISING MIXING THE ORE WITH AT LEAST 2.5% BUT LESS THAN 100% OF AN ALKALINE COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE OXIDES, CARBONATES AND HYDROXIDES OF ALKALI METALS OTHER THAN LITHIUM AND THE OXIDES, CARBONATES AND HYDROXIDES OF THE ALKALINE EARTH METALS BASED UPON THE LITHIUM MINERAL CONTENT OF THE ORE, CALCINING SAID MIXTURE AT A TEMPERATURE FROM ABOUT 700* C. UPWARDS TO AT LEAST PARTIALLY FUSE THE MIXTURE TO OBTAIN THEREBY A CALCINED PRODUCT NON-LEACHABLE WITH WATER, AND THEREAFTER LEACHING THE CALCINED PRODUCT WITH AN AQUEOUS LEACHING ELECTROLYTE OTHER THAN LITHIUM, SAID ELECTROLYTE BEING SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC ACID, ALKALI METAL NITRATES, ALKALINE METAL SULPHATES, ALKALI METAL NITRATES, ALKALINE EARTH CHLORIDES AND ALKALINE EARTH NITRATES TO OBTAIN THE LITHIUM SALT FORMED IN THE AQUEOUS LEACHING SOLUTION.
Claim 2
Independent Claim
144 words
A METHOD OF RECOVERING LITHIUM FROM ITS ALUMINUM AND SILICATE CONTAINING ORES COMPRISING MIXING THE ORE WITH AT LEAST 2.5% BUT LESS THAN 100% OF AN ALKALINE COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE OXIDES, CARBONATES AND HYDROXIDES OF ALKALI METALS OTHER THAN LITHIUM AND THE OXIDES, CARBONATES AND HYDROXIDES OF THE ALKALINE EARTH METALS BASED UPON THE LITHIUM MINERAL CONTENT OF THE ORE, CALCINING SAID MIXTURE AT A TEMPERATURE FROM ABOUT 700* C. UPWARDS TO AT LEAST PARTIALLY FUSE THE MIXTURE TO OBTAIN THEREBY A CALCINED PRODUCT NON-LEACHABLE WITH WATER, AND THEREAFTER LEACHING THE CALCINED PRODUCT WITH AN AQUEOUS LEACHING ELECTROLYTE OTHER THAN LITHIUM, SAID ELECTROLYTE BEING SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC ACID, ALKALI METAL NITRATES, ALKALINE METAL SULPHATES, ALKALI METAL NITRATES, ALKALINE EARTH CHLORIDES AND ALKALINE EARTH NITRATES TO OBTAIN THE LITHIUM SALT FORMED IN THE AQUEOUS LEACHING SOLUTION.
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) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |