US2699377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of potassium hydroxide
Assignee: International Minerals and Chemical Corp
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Filing: 1953-08-14
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Granted: 1955-01-11
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Expires: 1973-08-14
Abstract
No abstract record available.
Inventors
- 👤 William B Dancy
- 👤 Adams Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:11
CPC Classifications
C; C01; C01D; C01D1/00; C01D1/04; C01D1/28; C01D1/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR THE PURIFICATION OF POTASSIUM HYDROXIDE CONTAINING POTASSIUM CHLORIDE AS IMPURITY WHICH COMPRISES PREPARING A SLURRY OF POTASSIUM HYDROXIDE AS THE DIHYDRATE, REAGENTIZING THE POTASSIUM HYDROXIDE DIHYDRATE SLURRY WITH A COLLECTING AGENT SELECTED FROM THE GROUP CONSISTING OF PRIMARY ALIPHATIC AMINES CONTAINING A STRAIGHT CHAIN HYDROCARBON GROUP HAVING BETWEEN 7 AND 22 CARBON ATOMS AND THEIR WATER SOLUBLE ACID ADDITION SALTS DISSOLVED IN AN AQUEOUS WATER-MISCIBLE ALCOHOL SOLUTION, CONDITIONING THE REAGENTIZED SLURRY, SUBJECTING THE CONDITIONED SLURRY TO FROTH FLOTATION, AND RECOVERING THE NONFLOATED FRACTION CONTAINING PURIFIED POTASSIUM HYDROXIDE.
Claim 2
Dependent Claim
90 words
A PROCESS FOR THE PURIFICATION OF POTASSIUM HYDROXIDE CONTAINING POTASSIUM CHLORIDE AS IMPURITY WHICH COMPRISES PREPARING A SLURRY OF POTASSIUM HYDROXIDE AS THE DIHYDRATE, REAGENTIZING THE POTASSIUM HYDROXIDE DIHYDRATE SLURRY WITH A COLLECTING AGENT SELECTED FROM THE GROUP CONSISTING OF PRIMARY ALIPHATIC AMINES CONTAINING A STRAIGHT CHAIN HYDROCARBON GROUP HAVING BETWEEN 7 AND 22 CARBON ATOMS AND THEIR WATER SOLUBLE ACID ADDITION SALTS DISSOLVED IN AN AQUEOUS WATER-MISCIBLE ALCOHOL SOLUTION, CONDITIONING THE REAGENTIZED SLURRY, SUBJECTING THE CONDITIONED SLURRY TO FROTH FLOTATION, AND RECOVERING THE NONFLOATED FRACTION CONTAINING PURIFIED POTASSIUM HYDROXIDE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-10 | 1958-07-12 | 1959-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-10 | 1962-07-12 | 1963-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-10 | 1966-07-12 | 1967-01-11 | $7700.00 | Window Closed / Lapsed |