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Patent US2683649A successfully refreshed from Google Patents.
US2683649A
Expired / Lapsed
US
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Method of purifying brine
Assignee: Diamond Shamrock Corp
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Filing: 1951-12-06
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Granted: 1954-07-13
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Expires: 1971-12-06
Abstract
No abstract record available.
Inventors
- 👤 Hirsch Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:26
CPC Classifications
C; C01; C01D; C01D3/00; C01D3/14; C01D3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
THE METHOD FOR CONTROLLING THE SULFATE ION CONCENTRATION OF A SUBSTANTIALLY SATURATED SODIUM CHLORIDE BRINE HAVING A SULFATE ION CONCENTRATION ABOVE ABOUT 2 GRAMS OF SULFATE ION PER LITER OF BRINE, WHICH INCLUDES THE STEPS OF ADDING CALCIUM CHLORIDE TO SAID BRINE SUFFICIENT TO PROVIDE A MOLAR RATIO OF CA:SO4 ION ABOVE ABOUT 2.4:1, WHILE MAINTAINING THE SUBSTANTIAL SATURATION OF SAID BRINE WITH RESPECT TO SODIUM CHLORIDE, AGITATING THE MIXTURE OF SAID BRINE AND SAID CALCIUM CHLORIDE FOR A PERIOD SUFFICIENT SUBSTANTIALLY TO ESTABLISH EQUILIBRIUM CONDITIONS IN SAID MIXTURE AND TO PRECIPITATE CALCIUM SULFATE FROM SAID MIXTURE, AND SEPARATING SAID CALCIUM SULFATE FROM SAID MIXTURE AFTER SAID PERIOD.
Claim 2
Independent Claim
108 words
THE METHOD FOR CONTROLLING THE SULFATE ION CONCENTRATION OF A SUBSTANTIALLY SATURATED SODIUM CHLORIDE BRINE HAVING A SULFATE ION CONCENTRATION ABOVE ABOUT 2 GRAMS OF SULFATE ION PER LITER OF BRINE, WHICH INCLUDES THE STEPS OF ADDING CALCIUM CHLORIDE TO SAID BRINE SUFFICIENT TO PROVIDE A MOLAR RATIO OF CA:SO4 ION ABOVE ABOUT 2.4:1, WHILE MAINTAINING THE SUBSTANTIAL SATURATION OF SAID BRINE WITH RESPECT TO SODIUM CHLORIDE, AGITATING THE MIXTURE OF SAID BRINE AND SAID CALCIUM CHLORIDE FOR A PERIOD SUFFICIENT SUBSTANTIALLY TO ESTABLISH EQUILIBRIUM CONDITIONS IN SAID MIXTURE AND TO PRECIPITATE CALCIUM SULFATE FROM SAID MIXTURE, AND SEPARATING SAID CALCIUM SULFATE FROM SAID MIXTURE AFTER SAID PERIOD.
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) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |