METHOD OF PRODUCTION OF AGENT SELECTED FROM SERIES: BORON, PHOSPHORUS, SILICON AND RARE-EARTH METALS (VERSIONS)

摘要

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