Process for producing niobium metal of an ultrahigh purity
US4720300A · kind A · utility
10Cited by
8References
8Claims
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Key dates
| Filing date | Jun 3, 1986 |
| Grant date | Jan 19, 1988 |
| Priority date | — |
| Expiry date | Jun 3, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B4/005
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for producing niobium metal of an ultrahigh purity, which comprises iodizing niobium metal or niobium chloride containing at least tantalum as an impurity, thermally reducing the iodized product, and then thermally decomposing the reduced product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.