Reduction of MoO.sub.3 and ammonium molybdates by ammonia in a rotary furnace
US4547220A · kind A · utility
8Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1984 |
| Grant date | Oct 15, 1985 |
| Priority date | — |
| Expiry date | Apr 24, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method is disclosed for the intermediate reduction of a molybdenum compound selected from the group consisting of MoO.sub.3 and ammonium molybdate to MoO.sub.2. The molybdenum compound is fed to an indirectly fired inclined rotary calciner and uncracked ammonia caused to flow to the rotary calciner either concurrently or countercurrently to the flow of the molybdenum compound. The residence time and temperature are controlled to produce MoO.sub.2 at a conversion efficiency of at least about 80%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.