METHOD FOR EXTRACTION SEPARATION OF TANTALUM AND NIOBIUM FROM ACID FLUORIDE-SULFATE SOLUTION

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FIELD : metallurgy of rare and dispersed metals, chemical technology. SUBSTANCE : invention relates to a method for extraction separation of tantalum and niobium. Method involves extraction separation of tantalum from niobium with organic solvent. As an organic solvent method involves using a mixture of methyl isobutyl ketone taken in the amount 40-80 vol.% with aliphatic (C7-C9)-alcohol taken in the amount 20-60 vol.%. At the extraction process tantalum transfers into organic phase and niobium - into aqueous phase. Then organic and aqueous phases are separated. Invention provides enhancing the extraction degree of tantalum into organic phase and to enhance the separation degree of tantalum and niobium in extraction. EFFECT : improved separating method. 5 tbl, 5 ex