FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing an aqueous solution containing nickel, cobalt and manganese, which enables to recover nickel, cobalt and manganese from raw materials and use them for making cathode-active material of a lithium-ion secondary battery. Method allows recovering valuable metals, such as nickel, cobalt and manganese, from raw material by means of a pressure leaching process, process of removing impurities and a process of precipitating a target substance, thereby reducing the amount of solvent used for extraction.
EFFECT: providing a stable working environment, increasing productivity and reducing production costs.
17 cl, 3 dwg, 14 tbl
