METHOD OF OBTAINING AGENT SELECTED FROM SERIES OF REFRACTORY METALS OR FROM SERIES OF NONMETALS: BORON, PHOSPHORUS, ARSENIC, SULFUR Russian patent published in 2007 - IPC C22B34/00 B01J19/08 

FIELD: metallurgy and chemical industry for obtaining high-purity rare-earth or refractory metals and nonmetals.

SUBSTANCE: proposed method includes fluoration of oxide or sulfide of selected agent by elemental fluorine, separation of fluoride of selected agent from mixture of gases thus obtained and decomposition of high-purity fluoride in jet of electron beam plasma at settling of pure agent on renewable substrate. Gaseous products of fluoride decomposition are removed from reaction chamber and elemental fluorine is separated from them and is directed for oxide or sulfide fluoration operation. Proposed method makes it possible to use any starting oxide- or sulfide-containing material including materials contaminated with admixtures, for example natural ore concentrates and to extract agents in form of high-purity fluorides which are used for further production of simple agents. Process requires practically no reagents due to oxide-fluorine cycle excluding thermal and chemical contamination of surrounding medium.

EFFECT: enhanced efficiency; enhanced environment safety.

10 cl, 1 dwg, 5 ex