Fluid bed reduction to produce molybdenum metal
US4659376A · kind A · utility
2Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1985 |
| Grant date | Apr 21, 1987 |
| Priority date | — |
| Expiry date | Dec 18, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S266/905
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Molybdenum trioxide in granular or powder form is reduced to molybdenum metal by stagewise fluid bed reduction wherein molybdenum trioxide is reduced to molybdenum dioxide using ammonia as the fluidizing-reducing gas at 400.degree. C. to 650.degree. C. and molybdenum dioxide is reduced to metal using hydrogen as the fluidizing-reducing gas at 700.degree. C. to 1400.degree. C. The content of impurities such as lead, zinc, bismuth and copper is reduced during the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.