Production of fresh water,brine and magnesium hydroxide
Abstract
Abstract DISCLOSED IS A METHOD FOR MAKING FRESH WATER AND BRINE FROM SEA WATER BY REACTING BITTERN, OBTAINED, FOR EXAMPLE, FROM THE EXTRACTION OF COMMON SALT, WITH CALCIUM OXIDE TO FORM AN AQUEOUS SUSPENSION OF MAGNESIUM HYDROXIDE WHICH IS TREATED WITH CARBON DIOXIDE TO FORM MAGNESIUM CARBONATE. THE MAGNESIUM CARBONATE IS ADDED TO THE SEA WATER TO PRECIPITATE CALCIUM OUT OF THE WATER AS CALCIUM CARBONATE WHICH IS FILTERED OFF AND THE REMAINING SOLUTION IS CONCENTRATED TO PRODUCE FRESH WATER AND BRINE. ALSO DISCLOSED IS A METHOD FOR PREPARING MAGNESIUM HYDROXIDE WHEREIN AN AQUEOUS MAGNESIUM CHLORIDE SOLUTION IS MIXED WITH QUICKLIME IN A CLOSED, ROTARY REACTION ZONE AT A TEMPERATURE OF ABOUT 50* TO 70* C. AT A PH OF ABOUT 8.0 TO 8.5.
Inventors
- 👤 Hisanobu Tabata
- 👤 Norimasa Tabata
- 👤 Rokuro Nakajima
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |