FIELD: inorganic chemistry. SUBSTANCE: initial solution of metal hypochlorite is acidified preliminary up to pH 4.0-6.8, and extraction of hypochlorous acid is carried out with a mixture of tributylphosphate with light saturated hydrocarbons, and prepared extract is contacted with concentrated aqueous hydroxide solution. Electrolysis sodium chloride solution is used as an aqueous solution. EFFECT: improved method of concentrate preparing. 2 cl
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