METHOD OF OBTAINING BERYLLIUM OXIDE AND BERYLLIUM METAL Russian patent published in 2017 - IPC C22B35/00 C22B7/00 C22B3/04 C22B3/20 C01F3/02 

FIELD: chemistry.

SUBSTANCE: beryllium-containing raw materials are fluorinated at 180°C in the melt of ammonium hydrofluoride. The formed cake is dissolved in water. Impurities from the production solution of ammonium tetrafluoroberillate are removed by precipitation with 25% ammonia solution and 12% sodium dimethyldithiocarbamate solution, sorption on activated carbon and recrystallization of ammonium tetrafluoroberillate ((NH₄)₂BeF₄). To produce beryllium fluoride, ammonium tetrafluoroberellate ((NH₄)₂BeF₄) is subjected to thermal decomposition in two stages. The resulting beryllium fluoride BeF₂ is used to produce beryllium oxide and beryllium metal.

EFFECT: possibility of processing natural raw materials processing of natural raw materials to produce several products.

3 cl, 1 dwg, 2 ex