FIELD: production of high-purity agents from low-cost raw materials contaminated with admixtures, such as natural ore concentrates.
SUBSTANCE: proposed method consists in use of elemental fluorine as halogen-oxidizer for oxide- or sulfide-containing starting raw material, thus making it possible to obtain fluorides extracted from it even at break-down stage in high-purity state (more than 99.99 mass-%) and to use them as initial compound for further reduction of pure agents in carrying-out the oxidizer-elemental fluorine cycle which is performed due to reduction process at simultaneous obtaining of elemental fluorine to be directed to starting material fluoration process.
EFFECT: avoidance of reagents due to oxidizer-fluorine cycle; avoidance of thermal and chemical contamination of surrounding medium.
3 cl, 2 dwg, 4 ex
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