Patent US2764472A successfully refreshed from Google Patents.
US2764472A
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Brine purification
Assignee: Honeywell International Inc
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Filing: 1954-06-16
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Granted: 1956-09-25
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Expires: 1974-06-16
Abstract
No abstract record available.
Inventors
- 👤 William R Cady
- 👤 Arlie P Julien
- 👤 Donald J Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:23
CPC Classifications
C; C01; C01D; C01D3/00; C01D3/14; C01D3/16; Y; Y10; Y10S; Y10S159/00; Y10S159/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A CONTINUOUS PROCESS FOR PRODUCING SUBSTANTIALLY PURE SODIUM CHLORIDE CRYSTALS FROM SODIUM CHLORIDE BRINE CONTAINING DISSOLVED THEREIN CALCIUM SULFATE, CALCIUM CHLORIDE, MAGNESIUM CHLORIDE AND STRONTIUM SULFATE WHICH COMPRISES INTRODUCING SODIUM SULFATE INTO SAID BRINE, REACTING THE INTRODUCED SODIUM SULFATE WITH SAID BRINE AT A TEMPERATURE OF 60*-100* C. AND FOR A PERIOD OF NOT MORE THAN ABOUT ONE HOUR, THEREBY FORMING CRYSTALLINE CALCIUM SULFATE COMPOUND OF THE GROUP CONSISTING OF CALCIUM SULFATE HEMIHYDRATE, GLAUBERITE AND MIXTURES THEREOF, SEPARATING SAID CALCIUM SULFATE COMPOUND, TREATING THE RESULTANT MOTHER LIQUOR WITH AN ALKALI METAL CARBONATE AND A MEMBER OF THE GROUP CONSISTING OF ALKALI METAL HYDROX-
Claim 2
Dependent Claim
103 words
A CONTINUOUS PROCESS FOR PRODUCING SUBSTANTIALLY PURE SODIUM CHLORIDE CRYSTALS FROM SODIUM CHLORIDE BRINE CONTAINING DISSOLVED THEREIN CALCIUM SULFATE, CALCIUM CHLORIDE, MAGNESIUM CHLORIDE AND STRONTIUM SULFATE WHICH COMPRISES INTRODUCING SODIUM SULFATE INTO SAID BRINE, REACTING THE INTRODUCED SODIUM SULFATE WITH SAID BRINE AT A TEMPERATURE OF 60*-100* C. AND FOR A PERIOD OF NOT MORE THAN ABOUT ONE HOUR, THEREBY FORMING CRYSTALLINE CALCIUM SULFATE COMPOUND OF THE GROUP CONSISTING OF CALCIUM SULFATE HEMIHYDRATE, GLAUBERITE AND MIXTURES THEREOF, SEPARATING SAID CALCIUM SULFATE COMPOUND, TREATING THE RESULTANT MOTHER LIQUOR WITH AN ALKALI METAL CARBONATE AND A MEMBER OF THE GROUP CONSISTING OF ALKALI METAL HYDROX-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |