Patent US2947690A successfully refreshed from Google Patents.
US2947690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating of sea water for sulfur mining
Assignee: Freeport Minerals Co
•
Filing: 1956-07-19
•
Granted: 1960-08-02
•
Expires: 1976-07-19
Abstract
No abstract record available.
Inventors
- 👤 Bernard A Axelrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:58
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/285; E21B36/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
A PROCESS FOR SUPERHEATING SEA WATER AND OTHER WATERS OF HIGH SALINITY TO SULFUR MINING HIGH TEMPERATURES IN TUBES OF INDIRECT HEAT EXCHANGERS WITHOUT CAUSING SUBSTANTIAL SCALE DEPOSITION, PUMPING SEA WATER DOWN INTO TUBES WHICH COMPRISES, PUMPING SEA WATER DOWN INTO AND OUT OF A SALT DOME THEREBY PRODUCING A CONCENTRATED BRINE, REMOVING AT LEAST 20% OF THE CALCIUM SULFATE CONTENT BY REACTING THE SAME WITH SODIUM CARBONATE AND SEPARATING THE CALCIUM CARBONATE PRECIPITATE FORMED, MIXING THE RESULTING BRINE IN A PROPORTION OF 0.1 TO 10% WITH SEA WATER, INCREASING THE HYDROGEN ION CONCENTRATION OF THE RESULTING WATER-BRINE MIXTURE TO A PH VALUE OF ABOUT 6.5-7.5, FORCING THE MIXED WATERS UNDER SUPERATMOSPHERIC PRESSURE INTO AND THORUGH THE TUBES OF THE HEAT EXCHANGER, HEATING THE SAME IN SAID TUBES TO A TEMPERATURE AT WHICH SCALE DEPOSITION WOULD OCCUR IF IT WERE THE RAW SALINE WATER INITIALLY USED, AND MAINTAINING THE TEMPERATURE OF THE HEATING SURFACES OF THE TUBES IN CONTACT WITH THE ALTERED SALINE WATER BELOW THAT WHICH CAUSES PRECIPITATION OF THE CALCIUM SULFATE PERCENT IN SAID WATER.
Claim 2
Dependent Claim
177 words
A PROCESS FOR SUPERHEATING SEA WATER AND OTHER WATERS OF HIGH SALINITY TO SULFUR MINING HIGH TEMPERATURES IN TUBES OF INDIRECT HEAT EXCHANGERS WITHOUT CAUSING SUBSTANTIAL SCALE DEPOSITION, PUMPING SEA WATER DOWN INTO TUBES WHICH COMPRISES, PUMPING SEA WATER DOWN INTO AND OUT OF A SALT DOME THEREBY PRODUCING A CONCENTRATED BRINE, REMOVING AT LEAST 20% OF THE CALCIUM SULFATE CONTENT BY REACTING THE SAME WITH SODIUM CARBONATE AND SEPARATING THE CALCIUM CARBONATE PRECIPITATE FORMED, MIXING THE RESULTING BRINE IN A PROPORTION OF 0.1 TO 10% WITH SEA WATER, INCREASING THE HYDROGEN ION CONCENTRATION OF THE RESULTING WATER-BRINE MIXTURE TO A PH VALUE OF ABOUT 6.5-7.5, FORCING THE MIXED WATERS UNDER SUPERATMOSPHERIC PRESSURE INTO AND THORUGH THE TUBES OF THE HEAT EXCHANGER, HEATING THE SAME IN SAID TUBES TO A TEMPERATURE AT WHICH SCALE DEPOSITION WOULD OCCUR IF IT WERE THE RAW SALINE WATER INITIALLY USED, AND MAINTAINING THE TEMPERATURE OF THE HEATING SURFACES OF THE TUBES IN CONTACT WITH THE ALTERED SALINE WATER BELOW THAT WHICH CAUSES PRECIPITATION OF THE CALCIUM SULFATE PERCENT IN SAID WATER.
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) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |