FIELD: metallurgy.
SUBSTANCE: invention can be implemented in method of extraction and concentrating rhenium (VII) from acid sulphate, chloride and nitrate solutions. The method consists in extraction of rhenium from acid solutions and its successive re-extraction with water solution of ammonia. As extracting agent mixture of hexabutyltriamide and trialkylphosphineoxide in kerosene is used. Reagents are taken at molar ratio 1.0 : (0.2-5.0) correspondingly.
EFFECT: upgraded degree of rhenium extraction, increased rate and selectivity of extraction process, and reduction of losses of organic reagents with water solutions.
6 tbl, 6 ex
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