Rhenium and molybdenum separation from sulfide ores
Abstract
Abstract A process is disclosed for the initial removal of rhenium and other metallic impurities from a sulfide bearing molybdenite ore. A relatively small amount of the molybdenum remains with the rhenium while a major portion is dissolved in water. The rhenium and this portion of the molybdenum are recovered from the other metallic impurities. The process does not evolve sulfur dioxide thus eliminates a potential air pollution problem. The process comprises reacting the ores with at least about 15 percent excess of the amount of alkali metal carbonate theoretically required to convert the molybdenum and sulfur in the ore to water soluble compound under controlled temperatures, leaching 95 percent of the molybdenum from the resulting fusion mass, oxidizing the leached fusion mass, treating the oxidized mass with water to extract the rhenium and molybdenum from the other metallic impurities and recovering the rhenium and molybdenum.
Inventors
- 👤 B Martin
- 👤 Innis M Mac
Bibliographic Details
Claims Analysis
Total Claims: 4References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |