Patent EP0323042A1 successfully refreshed from Google Patents.
Patent US2902418A successfully refreshed from Google Patents.
US2902418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of pure sodium chloride brines
Assignee: Morton Salt Co
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Filing: 1959-03-10
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Granted: 1959-09-01
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Expires: 1979-03-10
Abstract
No abstract record available.
Inventors
- 👤 Claude A Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:37
CPC Classifications
C; C01; C01D; C01D3/00; C01D3/04; C01D3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
IN A METHOD OF PREPARING SODIUM CHLORIDE BRINE WHEREIN WATER CONTAINING BICARBONATES AND AN IMPURE SODIUM CHLORIDE CONTAINING CALCIUM SULFATE AS AN IMPURITY ARE BROUGHT INTO CONTACT TO FORM SAID BRINE, THE IMPROVEMENT WHICH COMPRISES INHIBITING SOLUTION OF THE CALCIUM SULFATE IN SAID BRINE AS IT IS FORMED BY ADDING TO SAID WATER, (A) 1 TO 20 P.P.M. OF A MOLECULARLY DEHYDRATED SODIUM PHOSPHATE HAVING AN ANALYTICAL RATIO OF 1 TO 2 PARTS OF NA2O TO 1 PART P2O5, AND (B) SODIUM HYDROXIDE SUFFICIENT TO PRODUCE FROM THE BICARBONATE CONTENT OF SAID WATER FROM ABOUT 1 TO 300 PARTS BY WEIGHT OF SODIUM CARBONATE FOR EACH PART BY WESIGHT OF ADDED PHOSPHATE, AND CONTACTING SAID TREATED WATER WITH THE IMPURE SODIUM CHLORIDE TO FORM A SODIUM BRINE LOW IN CALCIUM AND SULFATE IONS.
Claim 2
Dependent Claim
133 words
IN A METHOD OF PREPARING SODIUM CHLORIDE BRINE WHEREIN WATER CONTAINING BICARBONATES AND AN IMPURE SODIUM CHLORIDE CONTAINING CALCIUM SULFATE AS AN IMPURITY ARE BROUGHT INTO CONTACT TO FORM SAID BRINE, THE IMPROVEMENT WHICH COMPRISES INHIBITING SOLUTION OF THE CALCIUM SULFATE IN SAID BRINE AS IT IS FORMED BY ADDING TO SAID WATER, (A) 1 TO 20 P.P.M. OF A MOLECULARLY DEHYDRATED SODIUM PHOSPHATE HAVING AN ANALYTICAL RATIO OF 1 TO 2 PARTS OF NA2O TO 1 PART P2O5, AND (B) SODIUM HYDROXIDE SUFFICIENT TO PRODUCE FROM THE BICARBONATE CONTENT OF SAID WATER FROM ABOUT 1 TO 300 PARTS BY WEIGHT OF SODIUM CARBONATE FOR EACH PART BY WESIGHT OF ADDED PHOSPHATE, AND CONTACTING SAID TREATED WATER WITH THE IMPURE SODIUM CHLORIDE TO FORM A SODIUM BRINE LOW IN CALCIUM AND SULFATE IONS.
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) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |