US3323875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of carnallite liquors and potassium chloride
Assignee: Dow Chemical Co
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Filing: 1964-09-25
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Granted: 1967-06-06
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Expires: 1984-09-25
Abstract
No abstract record available.
Inventors
- 👤 Hollis R Been
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:13
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/26; C01F5/30; C01D; C01D3/00; C01D3/04; C01D3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
IN A METHOD FOR PREPARING CARNALLITE MOTHER LIQUOR AND POTASSIUM CHLORIDE CRYSTALS BY PROVIDING AN AQUEOUS BRINE FEED CONTAINING AT LEAST MAGNESIUM CHLORIDE, POTASSIUM CHLORIDE, AND CALCIUM CHLORIDE, COOLING AND MAINTAINING SAID BRINE AT A TEMEPERATURE OF FROM ABOUT 28 TO BOUT 32*C. FOR AN EXTENDED PERIOD OF TIME SO AS TO PRECIPITATE CARNALLITE CRYSTALS OUT OF SOLUTION, SEPARATING SAID CRYSTALS FROM THE MOTHER LIQUOR, LEACHING SAID CRYSTALS WITH WATER TO PRODUCE CRYSTALS OF POTASSIUM CHLORIDE AND A LEACHATE RICH IN MAGNESIUM CHLORIDE, SEPARATING SAID POTASSIUM CHLORIDE CRYSTALS FROM THE LEACHATE, AND RECYCLING A PORTION OF THE LEACHATE AS PART OF THE FEED SOLUTION, THE IMPROVEMENT WHICH COMPRISES: (A) RECYCLING FROM ABOUT 85 TO ABOUT 95 PERCENT OF THE MAGNESIUM CHLORIDE RICH LEACHATE AS PART OF THE FEED SOLUTION, AND (B) ADDING A MAGNESIUM DEFICIENT BRINE CONTAINING AT LEAST POTASSIUM CHLORIDE AND CALCIUM CHLORIDE TO THE FEED SO THAT THE TOTAL FEED BRINE CONTAINS A WEIGHT RATION OF MGCL2/KCL OF FROM ABOUT 2.0 TO ABOUT 2.35.
Claim 2
Dependent Claim
166 words
IN A METHOD FOR PREPARING CARNALLITE MOTHER LIQUOR AND POTASSIUM CHLORIDE CRYSTALS BY PROVIDING AN AQUEOUS BRINE FEED CONTAINING AT LEAST MAGNESIUM CHLORIDE, POTASSIUM CHLORIDE, AND CALCIUM CHLORIDE, COOLING AND MAINTAINING SAID BRINE AT A TEMEPERATURE OF FROM ABOUT 28 TO BOUT 32*C. FOR AN EXTENDED PERIOD OF TIME SO AS TO PRECIPITATE CARNALLITE CRYSTALS OUT OF SOLUTION, SEPARATING SAID CRYSTALS FROM THE MOTHER LIQUOR, LEACHING SAID CRYSTALS WITH WATER TO PRODUCE CRYSTALS OF POTASSIUM CHLORIDE AND A LEACHATE RICH IN MAGNESIUM CHLORIDE, SEPARATING SAID POTASSIUM CHLORIDE CRYSTALS FROM THE LEACHATE, AND RECYCLING A PORTION OF THE LEACHATE AS PART OF THE FEED SOLUTION, THE IMPROVEMENT WHICH COMPRISES: (A) RECYCLING FROM ABOUT 85 TO ABOUT 95 PERCENT OF THE MAGNESIUM CHLORIDE RICH LEACHATE AS PART OF THE FEED SOLUTION, AND (B) ADDING A MAGNESIUM DEFICIENT BRINE CONTAINING AT LEAST POTASSIUM CHLORIDE AND CALCIUM CHLORIDE TO THE FEED SO THAT THE TOTAL FEED BRINE CONTAINS A WEIGHT RATION OF MGCL2/KCL OF FROM ABOUT 2.0 TO ABOUT 2.35.
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) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |