US2617710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of extracting potassium from dilute solutions
Assignee: Norduco AS
•
Filing: 1949-07-01
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Granted: 1952-11-11
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Expires: 1969-07-01
Abstract
No abstract record available.
Inventors
- 👤 Kielland Jacob
- 👤 Harang Hakon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:36
CPC Classifications
C; C01; C01D; C01D17/00; C01D17/003; C01D17/006; C07; C07C; C07C51/00; C07C51/41; C07C51/412
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A METHOD OF EXTRACTING POTASSIUM FROM AN AQUEOUS SOLUTION OF A POTASSIUM COMPOUND, COMPRISING THE STEPS OF ADDING TO THE SAID SOLUTION A HIGHLY NITRATED DIPHENYL AMINE IN SOLID STATE, AND LIME WHICH FORMS AN EASILY SOLUBLE SALT WITH THE HIGHLY NITRATED DIPHENYL AMINE, PRECIPITATING THEREBY A SUBSTANTIALLY INSOLUBLE POTASSIUM SALT OF SAID AMINE, SEPARATING THE SAID SUBSTANTIALLY INSOLUBLE POTASSIUM SALT AND TREATING IT WITH A MINERAL ACID, RECOVERING THEREBY THE FREE HIGHLY NITRATED DIPHENYL AMINE IN SOLID STATE, SEPARATING THE LATTER AND CONVEYING IT BACK TO THE POTASSIUM PRECIPITATION STEP FOR REUSE AS A POTASSIUM PRECIPITATING AGENT, AND OBTAINING SIMULTANEOUSLY A POTASSIUM SALT SOLUTION OF THE SAID ACID.
Claim 2
Independent Claim
109 words
A METHOD OF EXTRACTING POTASSIUM FROM AN AQUEOUS SOLUTION OF A POTASSIUM COMPOUND, COMPRISING THE STEPS OF ADDING TO THE SAID SOLUTION A HIGHLY NITRATED DIPHENYL AMINE IN SOLID STATE, AND LIME WHICH FORMS AN EASILY SOLUBLE SALT WITH THE HIGHLY NITRATED DIPHENYL AMINE, PRECIPITATING THEREBY A SUBSTANTIALLY INSOLUBLE POTASSIUM SALT OF SAID AMINE, SEPARATING THE SAID SUBSTANTIALLY INSOLUBLE POTASSIUM SALT AND TREATING IT WITH A MINERAL ACID, RECOVERING THEREBY THE FREE HIGHLY NITRATED DIPHENYL AMINE IN SOLID STATE, SEPARATING THE LATTER AND CONVEYING IT BACK TO THE POTASSIUM PRECIPITATION STEP FOR REUSE AS A POTASSIUM PRECIPITATING AGENT, AND OBTAINING SIMULTANEOUSLY A POTASSIUM SALT SOLUTION OF THE SAID ACID.
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) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |