US2516987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing purified brine
Assignee: Akzo Nobel Salt Inc
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Filing: 1948-03-10
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Granted: 1950-08-01
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Expires: 1968-03-10
Abstract
No abstract record available.
Inventors
- 👤 David W Hengerer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:27
CPC Classifications
C; C01; C01D; C01D3/00; C01D3/14; C01D3/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN A METHOD OF PRODUCING PURIFIED SODIUM CHLORIDE BRINE BY PASSING AN AQUEOUS FEED SOLUTION DOWN THROUGH A BED OF SALT HAVING A DEPTH SUFFICIENT TO SATURATE THE SOLUTION WITH SODIUM CHLORIDE BEFORE THE SOLUTION HAS PASSED COMPLETELY THROUGH THE SALT BED, THE IMPROVEMENT WHICH COMPRISES ADDING SODA ASH AND CASTIC SODA TO THE FEED SOLUTION PRIOR TO PASSING SAID SOLUTION INTO THE SALT BED, WHEREBY THE COMPOUNDS IN THE FEED SOLUTION AND THOSE REMOVED FROM THE SALT DURING PASSAGE OF THE SOLUTION THROUGH THE SALT BED, AND WHICH ARE CONVERTIBLE TO INSOLUBLE PRECIPITATES BY REACTION WITH SODA ASH OR CAUSTIC SODA ARE SO CONVERTED TO INSOLUBLE PRECIPITATES, AND SIMULTANEOUSLY FILTERING THE BRINE SOLUTION THROUGH SAID SALT BED TO REMOVE SAID INSOLUBLE PRECIPITATES FROM THE BRINE.
Claim 2
Dependent Claim
126 words
IN A METHOD OF PRODUCING PURIFIED SODIUM CHLORIDE BRINE BY PASSING AN AQUEOUS FEED SOLUTION DOWN THROUGH A BED OF SALT HAVING A DEPTH SUFFICIENT TO SATURATE THE SOLUTION WITH SODIUM CHLORIDE BEFORE THE SOLUTION HAS PASSED COMPLETELY THROUGH THE SALT BED, THE IMPROVEMENT WHICH COMPRISES ADDING SODA ASH AND CASTIC SODA TO THE FEED SOLUTION PRIOR TO PASSING SAID SOLUTION INTO THE SALT BED, WHEREBY THE COMPOUNDS IN THE FEED SOLUTION AND THOSE REMOVED FROM THE SALT DURING PASSAGE OF THE SOLUTION THROUGH THE SALT BED, AND WHICH ARE CONVERTIBLE TO INSOLUBLE PRECIPITATES BY REACTION WITH SODA ASH OR CAUSTIC SODA ARE SO CONVERTED TO INSOLUBLE PRECIPITATES, AND SIMULTANEOUSLY FILTERING THE BRINE SOLUTION THROUGH SAID SALT BED TO REMOVE SAID INSOLUBLE PRECIPITATES FROM THE BRINE.
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) | 1953-07-31 | 1954-01-30 | 1954-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-31 | 1958-01-30 | 1958-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-31 | 1962-01-30 | 1962-08-01 | $7700.00 | Window Closed / Lapsed |