US2659656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the recovery of potassium from sea water and saline aqueous solutions
Assignee: Norduco AS
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Filing: 1951-06-14
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Granted: 1953-11-17
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Expires: 1971-06-14
Abstract
No abstract record available.
Inventors
- 👤 Berner Endre Qvie
- 👤 Kielland Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:57
CPC Classifications
C; C01; C01D; C01D17/00; C01D17/003; C01D17/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A PROCESS FOR THE RECOVERY OF A POTASSIUM SALT FROM SEA WATER AND AQUEOUS SALINE SOLUTIONS CONTAINING DISSOLVED POTASSIUM SALTS, COMPRISING THE STEPS OF ADDING A WATER SOLUBLE SALT OF AN UNSYMMETRICALLY HIGHLY NITRATED SECONDARY AROMATIC AMINE SELECTED FROM THE GROUP CONSISTING OF 2,4,6,2'',4'',6'' HEXANITRO 3 HALO DIPHENYLAMINE, 2,4,6,3'',6'' PENTANITRO DIPHENYLAMINE, 2,4,2'',4'',6'' PENTANITRO DIPHENYLAMINE, ALKYL-SUBSTITUTED PENTANITRO DIPHENYLAMINE, HALOGEN-SUBSTITUTED PENTANITRO DIPHENYLAMINE, ALKOXY-SUBSTITUTED PENTANITRO DIPHENYLAMINE AND CARBOXY-SUBSTITUTED PENTANITRO DIPHENYLAMINE, TO THE SALINE SOLUTION TO PRECIPITATE THE POTASSIUM AS A SPARINGLY SOLUBLE SALT OF SAID HIGHLY NITRATED SECONDARY AROMATIC AMINE, SEPARATING THE PRECIPITATE FROM THE MOTHER LIQUOR, REACTING THE SEPARATED POTASSIUM SALT PRECIPITATE WITH AN ACID TO LIBERATE THE POTASSIUM SALT OF SAID ACID IN SOLUTION AND RECOVERING THE HIGHLY NITRATED SECONDARY AROMATIC AMINE.
Claim 2
Dependent Claim
121 words
A PROCESS FOR THE RECOVERY OF A POTASSIUM SALT FROM SEA WATER AND AQUEOUS SALINE SOLUTIONS CONTAINING DISSOLVED POTASSIUM SALTS, COMPRISING THE STEPS OF ADDING A WATER SOLUBLE SALT OF AN UNSYMMETRICALLY HIGHLY NITRATED SECONDARY AROMATIC AMINE SELECTED FROM THE GROUP CONSISTING OF 2,4,6,2'',4'',6'' HEXANITRO 3 HALO DIPHENYLAMINE, 2,4,6,3'',6'' PENTANITRO DIPHENYLAMINE, 2,4,2'',4'',6'' PENTANITRO DIPHENYLAMINE, ALKYL-SUBSTITUTED PENTANITRO DIPHENYLAMINE, HALOGEN-SUBSTITUTED PENTANITRO DIPHENYLAMINE, ALKOXY-SUBSTITUTED PENTANITRO DIPHENYLAMINE AND CARBOXY-SUBSTITUTED PENTANITRO DIPHENYLAMINE, TO THE SALINE SOLUTION TO PRECIPITATE THE POTASSIUM AS A SPARINGLY SOLUBLE SALT OF SAID HIGHLY NITRATED SECONDARY AROMATIC AMINE, SEPARATING THE PRECIPITATE FROM THE MOTHER LIQUOR, REACTING THE SEPARATED POTASSIUM SALT PRECIPITATE WITH AN ACID TO LIBERATE THE POTASSIUM SALT OF SAID ACID IN SOLUTION AND RECOVERING THE HIGHLY NITRATED SECONDARY AROMATIC AMINE.
References Cited (Backward Citations)
US2258381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-16 | 1957-05-18 | 1957-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-16 | 1961-05-18 | 1961-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-16 | 1965-05-18 | 1965-11-17 | $7700.00 | Window Closed / Lapsed |