US2977189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of purified brine
Assignee: International Salt Co Inc
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Filing: 1956-10-29
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Granted: 1961-03-28
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Expires: 1976-10-29
Abstract
No abstract record available.
Inventors
- 👤 Ladenburg Kurt
- 👤 Bloomberg Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:32
CPC Classifications
C; C01; C01D; C01D3/00; C01D3/14; C01D3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN A METHOD OF PREPARING BRINE IN WHICH THE MATERIALS BROUGHT INTO CONTACT TO FORM SAID BRINE ARE WATER AND SOLID SODIUM CHLORIDE CONTAINING A SUBSTANTIAL AMOUNT OF WATER-SOLUBLE CALCIUM SULFATE AS AN IMPURITY, THE IMPROVEMENT WHICH COMPRISES ADDING TO ONE OF SAID MATERIALS BEFORE BRINGING SAID MATERIALS INTO CONTACT (1) AN ALKALI METAL CARBONATE, AND (2) AN ALKALI METAL POLYPHOSPHATE SELECTED FROM THE GROUP CONSISTING OF THE ALKALIMETAL PYROPHOSPHATES, ALKALI METAL HEXAMETAPHOSPHATES AND ALKALI METAL TRIPOLYPHOSPHATES, AND THEREAFTER BRINGING SAID MATERIALS INTO CONTACT TO DISSOLVE SAID SODIUM CHLORIDE IN SAID WATER WHEREBY TO FORM A BRINE LOW IN CALCIUM RADICAL, SAID ALKALI METAL CARBONATE BEING EMPLOYED IN AN AMOUNT RANGING FROM ABOUT 0.3 TO 3 GRAMS, AND SAID ALKALI METAL POLYPHOSPHATE BEING EMPLOYED IN AN AMOUNT EQUIVALENT TO ABOUT 0.06 TO 1 GRAM OF PO4$ PER KILOGRAM OF DISSOLVED SODIUM CHLORIDE.
Claim 2
Dependent Claim
142 words
IN A METHOD OF PREPARING BRINE IN WHICH THE MATERIALS BROUGHT INTO CONTACT TO FORM SAID BRINE ARE WATER AND SOLID SODIUM CHLORIDE CONTAINING A SUBSTANTIAL AMOUNT OF WATER-SOLUBLE CALCIUM SULFATE AS AN IMPURITY, THE IMPROVEMENT WHICH COMPRISES ADDING TO ONE OF SAID MATERIALS BEFORE BRINGING SAID MATERIALS INTO CONTACT (1) AN ALKALI METAL CARBONATE, AND (2) AN ALKALI METAL POLYPHOSPHATE SELECTED FROM THE GROUP CONSISTING OF THE ALKALIMETAL PYROPHOSPHATES, ALKALI METAL HEXAMETAPHOSPHATES AND ALKALI METAL TRIPOLYPHOSPHATES, AND THEREAFTER BRINGING SAID MATERIALS INTO CONTACT TO DISSOLVE SAID SODIUM CHLORIDE IN SAID WATER WHEREBY TO FORM A BRINE LOW IN CALCIUM RADICAL, SAID ALKALI METAL CARBONATE BEING EMPLOYED IN AN AMOUNT RANGING FROM ABOUT 0.3 TO 3 GRAMS, AND SAID ALKALI METAL POLYPHOSPHATE BEING EMPLOYED IN AN AMOUNT EQUIVALENT TO ABOUT 0.06 TO 1 GRAM OF PO4$ PER KILOGRAM OF DISSOLVED SODIUM CHLORIDE.
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) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |