US3279897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective precipitation of potassium chloride by addition of ammonia
Assignee: Dow Chemical Co
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Filing: 1964-11-04
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Granted: 1966-10-18
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Expires: 1984-11-04
Abstract
No abstract record available.
Inventors
- 👤 Robert D Goodenough
- 👤 Klopf Adam Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:59
CPC Classifications
C; C01; C01D; C01D3/00; C01D3/04; C01D3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PROCESS FOR RECEIVING SOLID POTASSIUM CHLORIDE FROM WATER-SOLUBLE COMPOSITIONS CONTAINING PRIMARILY BOTH SODIUM CHLORIDE AND POTASSIUM CHLORIDE WHICH COMPRISES, ADMIXING AMMONIA WITH AN AQUEOUS MIXTURE CONTAINING SODIUM CHLORIDE AND POTASSIUM CHLORIDE TO PRODUCE A FINAL AMMONICACAL SOLUTION HAVING A CONCENTRATION BY WEIGHT OF FROM ABOUT 30 TO ABOUT 45 PERCENT OF AMMONIA AND A TEMPERATURE OF FROM ABOUT 0* TO ABOUT 50*C., THEREBY TO PRECIPITATE SOLID POTASSIUM CHLORIDE IN SAID REACTION MIXTURE AND SEPARATING SAID SOLID POTASSIUM CHLORIDE FROM SAID REACTION MIXTURE.
Claim 2
Dependent Claim
83 words
A PROCESS FOR RECEIVING SOLID POTASSIUM CHLORIDE FROM WATER-SOLUBLE COMPOSITIONS CONTAINING PRIMARILY BOTH SODIUM CHLORIDE AND POTASSIUM CHLORIDE WHICH COMPRISES, ADMIXING AMMONIA WITH AN AQUEOUS MIXTURE CONTAINING SODIUM CHLORIDE AND POTASSIUM CHLORIDE TO PRODUCE A FINAL AMMONICACAL SOLUTION HAVING A CONCENTRATION BY WEIGHT OF FROM ABOUT 30 TO ABOUT 45 PERCENT OF AMMONIA AND A TEMPERATURE OF FROM ABOUT 0* TO ABOUT 50*C., THEREBY TO PRECIPITATE SOLID POTASSIUM CHLORIDE IN SAID REACTION MIXTURE AND SEPARATING SAID SOLID POTASSIUM CHLORIDE FROM SAID REACTION MIXTURE.
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |