Patent US3073673A successfully refreshed from Google Patents.
US3073673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of lithium ores
Assignee: Individual
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Filing: 1959-11-27
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Granted: 1963-01-15
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Expires: 1979-11-27
Abstract
No abstract record available.
Inventors
- 👤 Philip A Chubb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:37
CPC Classifications
C; C22; C22B; C22B26/00; C22B26/10; C22B26/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
186 words
A PROCESS FOR THE PRODUCTION OF LITHIUM CARBONATE FROM SPODUMENE ORE COMPRISING THE STEPS OF DECREPITATING THE SPODUMENE ORE TO BETA SPODUMENE, PRESSURE LEACHING THE BETA SPODUMENE WITH A LEACHING SOLUTION CONSISTING ESSENTIALLY OF WATER, SODIUM HYDROXIDE AND A CALCIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF CALCIUM OXIDE AND CALCIUM HYDROXIDE, SAID LEACHING SOLUTION THUS CONTAINING SODIUM HYDROXIDE AND CALCIUM HYDROXIDE, TO THEREBY PRODUCE RESIDUE SOLIDS AND A FIRST SOLUTION CONTAINING LITHIUM HYDROXIDE AND EXCESS SODIUM HYDROXIDE AND CALCIUM HYDROXIDE, FILTERING THE SOLIDS FROM SAID FIRST SOLUTION; SUBJECTING THE FILTERED SOLUTION TO GASSING WITH CARBON DIOXIDE GAS TO PRECIPITATE LITHIUM CARBONATE AND CALCIUM CARBONATE WHICH ARE THEN FILTERED OUT LEAVING A SECOND SOLUTION CONTAINING SODIUM, CARBONATE AND A MINOR AMOUNT OF LITHIUM CARBONATE; PURIFYING THE PRECIPITATED CALCIUM CARBONATE AND LITHIUM CARBONATE FOR RECOVERY OF THE LATTER; CAUSTICIZING THE SAID SECOND SOLUTION WITH CALCIUM OXIDE TO THEREBY PRODUCE A MIXTURE OF A SOLUTION CONTAINING LITHIUM HYDROXIDE, SODIUM HYDROXIDE AND CALCIUM HYDROXIDE AND PRECIPITATED CALCIUM CARBONATE; FILTERING SAID MIXTURE TO SEPARATE THE CALCIUM CARBONATE THEREFROM AND BRINGING THIS FINAL FILTRATE UP TO STRENGTH AND VOLUME BY RECIRCULATION.
Claim 2
Dependent Claim
186 words
A PROCESS FOR THE PRODUCTION OF LITHIUM CARBONATE FROM SPODUMENE ORE COMPRISING THE STEPS OF DECREPITATING THE SPODUMENE ORE TO BETA SPODUMENE, PRESSURE LEACHING THE BETA SPODUMENE WITH A LEACHING SOLUTION CONSISTING ESSENTIALLY OF WATER, SODIUM HYDROXIDE AND A CALCIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF CALCIUM OXIDE AND CALCIUM HYDROXIDE, SAID LEACHING SOLUTION THUS CONTAINING SODIUM HYDROXIDE AND CALCIUM HYDROXIDE, TO THEREBY PRODUCE RESIDUE SOLIDS AND A FIRST SOLUTION CONTAINING LITHIUM HYDROXIDE AND EXCESS SODIUM HYDROXIDE AND CALCIUM HYDROXIDE, FILTERING THE SOLIDS FROM SAID FIRST SOLUTION; SUBJECTING THE FILTERED SOLUTION TO GASSING WITH CARBON DIOXIDE GAS TO PRECIPITATE LITHIUM CARBONATE AND CALCIUM CARBONATE WHICH ARE THEN FILTERED OUT LEAVING A SECOND SOLUTION CONTAINING SODIUM, CARBONATE AND A MINOR AMOUNT OF LITHIUM CARBONATE; PURIFYING THE PRECIPITATED CALCIUM CARBONATE AND LITHIUM CARBONATE FOR RECOVERY OF THE LATTER; CAUSTICIZING THE SAID SECOND SOLUTION WITH CALCIUM OXIDE TO THEREBY PRODUCE A MIXTURE OF A SOLUTION CONTAINING LITHIUM HYDROXIDE, SODIUM HYDROXIDE AND CALCIUM HYDROXIDE AND PRECIPITATED CALCIUM CARBONATE; FILTERING SAID MIXTURE TO SEPARATE THE CALCIUM CARBONATE THEREFROM AND BRINGING THIS FINAL FILTRATE UP TO STRENGTH AND VOLUME BY RECIRCULATION.
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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |