METHOD OF PURIFICATION OF WASTE WATERS AND PROCESS SOLUTIONS FROM COPPER Russian patent published in 2019 - IPC C02F1/42 C02F1/66 C02F1/62 C01G3/00 C22B3/42 C22B15/00 

FIELD: chemistry.

SUBSTANCE: invention relates to purification of under-water waters with ionites and can be used in mining industry. Method of cleaning subpetual waters and process solutions from copper involves removal of contained iron (III) ions and ion-exchange purification. Cleaning is carried out in two steps. At the first stage of purification into alkaline waters and process solutions alkali solution is added to pH = 3.5–4 and contained iron (III) ions are removed. At the second stage, bottom waters and process solutions, freed from iron (III) ions, are passed in dynamic mode through a column loaded with copper-selective ion-exchange resin - cationite in hydrogen form. Then copper is simultaneously desorbed and cationite is regenerated with 10 % solution of H₂SO₄ to negative reaction to Cu²⁺ ions to obtain concentrated solution of copper sulphate.

EFFECT: invention enables to remove sub-waste waters and process solutions from copper to obtain a copper sulphate solution used as an end product.

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