US2968525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Potash ore treatment
Assignee: International Minerals and Chemical Corp
•
Filing: 1958-06-09
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Granted: 1961-01-17
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Expires: 1978-06-09
Abstract
No abstract record available.
Inventors
- 👤 Howard P Clark
- 👤 Adams Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:20
CPC Classifications
C; C01; C01D; C01D3/00; C01D3/04; C01D3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A PROCESS OF BENEFICIATING SUBSTANTIALLY LIBERATED SYLVINITE ORE CONTAINING CARNALLITE, SAID CARNALLITE BEING PRESENT IN AN AMOUNT OF NOT MORE THAN 12% BY WEIGHT, WHICH COMPRISES SUBSTANTIALLY COMPLETELY REMOVING THE MAGNESIUM CHLORIDE CONTENT OF SAID CARNALLITE BY LEACHING SAID ORE WITH A MAGNESIUM CHLORIDE-CONTAINING BRINE SUBSTANTIALLY SATURATED WITH RESPECT TO SODIUM CHLORIDE AND POTASSIUM CHLORIDE BUT AT LEAST SUFFICIENTLY UNSATURATED WITH RESPECT TO MAGNESIUM CHLORIDE TO OBTAIN A VISCOSITY BELOW ABOUT 6.0 CENTIPOISES MEASURED AT 15*C. AFTER SAID LEACHING, AND SUBJECTING THE SOLIDS RESULTANT FROM SAID LEACHING TO FROTH FLOTATION IN A MAGNESIUM CHLORIDE-CONTAINING BRINE SUBSTANTIALLY SATURATED WITH RESPECT TO SODIUM CHLORIDE AND POTASSIUM CHLORIDE BUT AT LEAST SUFFICIENTLY UNSATURATED WITH RESPECT TO MAGNESIUM CHLORIDE TO OBTAIN A VISCOSITY OF LESS THAN 4.5 CENTIPOISES MEASURED AT 15*C. AND LOWER THAN THE VISCOSITY OF THE BRINE FROM SAID LEACHING, AND RECOVERING A SYLVITE CONCENTRATE.
Claim 2
Dependent Claim
143 words
A PROCESS OF BENEFICIATING SUBSTANTIALLY LIBERATED SYLVINITE ORE CONTAINING CARNALLITE, SAID CARNALLITE BEING PRESENT IN AN AMOUNT OF NOT MORE THAN 12% BY WEIGHT, WHICH COMPRISES SUBSTANTIALLY COMPLETELY REMOVING THE MAGNESIUM CHLORIDE CONTENT OF SAID CARNALLITE BY LEACHING SAID ORE WITH A MAGNESIUM CHLORIDE-CONTAINING BRINE SUBSTANTIALLY SATURATED WITH RESPECT TO SODIUM CHLORIDE AND POTASSIUM CHLORIDE BUT AT LEAST SUFFICIENTLY UNSATURATED WITH RESPECT TO MAGNESIUM CHLORIDE TO OBTAIN A VISCOSITY BELOW ABOUT 6.0 CENTIPOISES MEASURED AT 15*C. AFTER SAID LEACHING, AND SUBJECTING THE SOLIDS RESULTANT FROM SAID LEACHING TO FROTH FLOTATION IN A MAGNESIUM CHLORIDE-CONTAINING BRINE SUBSTANTIALLY SATURATED WITH RESPECT TO SODIUM CHLORIDE AND POTASSIUM CHLORIDE BUT AT LEAST SUFFICIENTLY UNSATURATED WITH RESPECT TO MAGNESIUM CHLORIDE TO OBTAIN A VISCOSITY OF LESS THAN 4.5 CENTIPOISES MEASURED AT 15*C. AND LOWER THAN THE VISCOSITY OF THE BRINE FROM SAID LEACHING, AND RECOVERING A SYLVITE CONCENTRATE.
References Cited (Backward Citations)
US2702121A
Cited
US2721657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |