Process of preparing nitrogen trifluoride by gas-solid reaction
US4543242A · kind A · utility
20Cited by
3References
8Claims
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Key dates
| Filing date | Sep 19, 1984 |
| Grant date | Sep 24, 1985 |
| Priority date | — |
| Expiry date | Sep 19, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B21/0835
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
NF.sub.3 is prepared with good yields by reaction between fluorine gas and an ammonium complex of a metal fluoride, such as (NH.sub.4).sub.3 AlF.sub.6, in solid phase. The metal flouride ammonium complex may be one additionally containing an alkali metal, such as (NH.sub.4).sub.2 NaAlF.sub.6. The gas-solid reaction is carried out preferably at temperatures above 80.degree. C. and at relatively low partial pressures of fluorine in the gas phase of the reaction system, so that the reaction is easy to control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.