US2839360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for reducing the concentration of alkali metal salts in calcium chloride brines
Assignee: Velsicol Chemical LLC
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Filing: 1955-02-24
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Granted: 1958-06-17
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Expires: 1975-02-24
Abstract
No abstract record available.
Inventors
- 👤 J R Gump
- 👤 Herbert C Wohlers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:03
CPC Classifications
C; C01; C01F; C01F11/00; C01F11/20; C01F11/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
THE METHOD FOR REDUCING THE CONCENTRATION OF ALKALI METAL SALTS IN CALCIUM CHLORIDE BRINES, COMPRISING THE STEPS OF COOLING THE CALCIUM CHLORIDE BRINE SUBSTANTIALLY INDEPENDENTLY OF THE CONCENTRATION OF CALCIUM CHLORIDE IN THE BRINE TO A TEMPERATURE ABOVE THE POINT AT WHICH CALCIUM CHLORIDE CRYSTALLIZES BUT BELOW THE TEMPERATURE AT WHICH THE CONCENTRATION OF SODIUM CHLORIDE CAPABLE OF REMAINING IN SOLUTION IN THE BRINE IS LESS THAN THE CONCENTRATION OF SODIUM CHLORIDE IN THE BINE, SEPARATING THE INSOLUBLE SODIUM CHLORIDE FROM THE BRINE, REMOVING WATER FROM THE BRINE TO INCREASE THE CONCENTRATION OF CALCIUM CHLORIDE IN THE BRINE TO BETWEEN 63-70 PERCENT BY WEIGHT, MAINTAINING THE TEMPERATURE OF THE BRINE ABOVE THE POINT AT WHICH CALCIUM CHLORIDE CRYSTALLIZES BUT BELOW ITS BOILING POINT WHEREBY THE POTASSIUM CHLORIDE IN THE BRINE IS EXCESS OF 2.32 PERCENT BY WEIGHT AT THE LOWER CONCENTRATION OF 1.61 PERCENT BY WEIGHT AT THE HIGHER CONCENTRATION FORMS INTO AN INSOLUBLE DOUBLE SALT OF KCL.CACL2, AND THEN SEPARATING THE INSOLUBLE DOUBLE SALT FROM THE CONCENTRATED BRINE SOLUTION.
Claim 2
Independent Claim
170 words
THE METHOD FOR REDUCING THE CONCENTRATION OF ALKALI METAL SALTS IN CALCIUM CHLORIDE BRINES, COMPRISING THE STEPS OF COOLING THE CALCIUM CHLORIDE BRINE SUBSTANTIALLY INDEPENDENTLY OF THE CONCENTRATION OF CALCIUM CHLORIDE IN THE BRINE TO A TEMPERATURE ABOVE THE POINT AT WHICH CALCIUM CHLORIDE CRYSTALLIZES BUT BELOW THE TEMPERATURE AT WHICH THE CONCENTRATION OF SODIUM CHLORIDE CAPABLE OF REMAINING IN SOLUTION IN THE BRINE IS LESS THAN THE CONCENTRATION OF SODIUM CHLORIDE IN THE BINE, SEPARATING THE INSOLUBLE SODIUM CHLORIDE FROM THE BRINE, REMOVING WATER FROM THE BRINE TO INCREASE THE CONCENTRATION OF CALCIUM CHLORIDE IN THE BRINE TO BETWEEN 63-70 PERCENT BY WEIGHT, MAINTAINING THE TEMPERATURE OF THE BRINE ABOVE THE POINT AT WHICH CALCIUM CHLORIDE CRYSTALLIZES BUT BELOW ITS BOILING POINT WHEREBY THE POTASSIUM CHLORIDE IN THE BRINE IS EXCESS OF 2.32 PERCENT BY WEIGHT AT THE LOWER CONCENTRATION OF 1.61 PERCENT BY WEIGHT AT THE HIGHER CONCENTRATION FORMS INTO AN INSOLUBLE DOUBLE SALT OF KCL.CACL2, AND THEN SEPARATING THE INSOLUBLE DOUBLE SALT FROM THE CONCENTRATED BRINE SOLUTION.
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) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |