US2750281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the extraction of alkali metals from their amalgams
Assignee: Solvay SA
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Filing: 1952-04-01
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Granted: 1956-06-12
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Expires: 1972-04-01
Abstract
No abstract record available.
Inventors
- 👤 Vanharen Lambert
- 👤 Octors Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:44
CPC Classifications
C; C22; C22B; C22B26/00; C22B26/10; C22C; C22C3/00; C22C3/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A PROCESS FOR EXTRACTING ALKALI METALS FROM THEIR AMALGAMS WHICH COMPRISES CONCENTRATING AN ALKALI METAL AMALGAM HAVING A CONCENTRATION OF LESS THAN 10% BY WEIGHT OF THE ALKALI METAL BY DISTILLING MERCURY THEREFROM TO INCREASE THE CONCENTRATION OF SAID ALKALI METAL TO A VALUE OF AT LEAST 10% BY WEIGHT, BRINGING THE CONCENTRATED AMALGAM THUS OBTAINED INTO CONTACT WITH A SOLVENT HAVING A SOLVENT ACTION UPON SAID ALKALI METAL BUT BEING NOT-REACTIVE WITH THE MERCURY AND THE AMALGAM, THEREBY DISSOLVING A PORTION OF THE ALKALI METAL FROM THE AMALGAM, SEPARATING THE AMALGAM FROM THE SOLUTION OF ALKALI METAL IN THE SOLVENT BY PHYSICAL MEANS, AND RECOVERING THE ALKALI METAL FROM THE SOLVENT.
Claim 2
Dependent Claim
112 words
A PROCESS FOR EXTRACTING ALKALI METALS FROM THEIR AMALGAMS WHICH COMPRISES CONCENTRATING AN ALKALI METAL AMALGAM HAVING A CONCENTRATION OF LESS THAN 10% BY WEIGHT OF THE ALKALI METAL BY DISTILLING MERCURY THEREFROM TO INCREASE THE CONCENTRATION OF SAID ALKALI METAL TO A VALUE OF AT LEAST 10% BY WEIGHT, BRINGING THE CONCENTRATED AMALGAM THUS OBTAINED INTO CONTACT WITH A SOLVENT HAVING A SOLVENT ACTION UPON SAID ALKALI METAL BUT BEING NOT-REACTIVE WITH THE MERCURY AND THE AMALGAM, THEREBY DISSOLVING A PORTION OF THE ALKALI METAL FROM THE AMALGAM, SEPARATING THE AMALGAM FROM THE SOLUTION OF ALKALI METAL IN THE SOLVENT BY PHYSICAL MEANS, AND RECOVERING THE ALKALI METAL FROM THE SOLVENT.
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) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |