METHOD OF UTILIZING USED CHEMICAL SOURCES OF CURRENT OF MANGANESE-ZINC SYSTEM Russian patent published in 2020 - IPC C22B7/00 B09B3/00 C22B19/30 C22B3/08 C22B47/00 

FIELD: technological processes.

SUBSTANCE: invention relates to a method of recycling spent, mainly manganese-zinc alkaline chemical source of electric energy (CSEE). Method involves grinding, separation and acid treatment. Grinding is carried out after dismantling of CSEE bodies, separation of packing materials of CSEE bodies and metal part, after which CSEE components are treated at room temperature for 1-3 hours with sulfuric acid with concentration of 40-48 %, taken in quantitative ratio of 2.66-3 to CSEE weighting value in the presence of hydrogen peroxide concentration of 3-10 %, taken in quantitative ratio of 3.26-10.6 to CSEE weighting value. Obtained mixture is filtered, separating graphite, and the filtered mother solution is neutralized with sodium hydroxide (NaOH) at room temperature to pH 6-8 and evaporated to obtain a dry residue - zinc sulphate and manganese sulphate crystals.

EFFECT: method enables to recycle manganese-zinc spent CSEE with higher extraction of manganese and zinc, while reducing the cost of recycling.

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