METHOD OF COMPLEX PROCESSING NATURAL BRINES OF MAGNESIUM-CALCIUM CHLORIDE TYPE Russian patent published in 2015 - IPC C01F1/00 C01B9/04 C01B11/06 C01D15/02 C01D15/08 C01F5/02 C01F11/18 C01F11/34 

FIELD: chemistry.

SUBSTANCE: invention can be applied in chemical industry. Method of complex processing of natural brines of magnesium-calcium chloride type includes obtaining calcium chloride crystallohydrate with admixture of magnesium chloride and enriching brine by lithium with further processing of lithium concentrate into lithium compounds. After operation of enrichment by lithium, bromine, magnesium oxide and chlorine are obtained by electrolysis of mother brine, enriched with sodium chloride. After separation of lithium and bromine brine is subjected to purification from magnesium, is evaporated until sodium chlorides salt out and separated from NaCl crystals. Said brine or water is used for dissolution of calcium chloride crystallohydrate with obtaining solution, containing 400-450 kg/m³ of calcium chloride. Calcium chloride solution is used in exchange reaction with sodium hypochlorite with obtaining calcium hypochlorite. Calcium chloride solution is used to obtain calcium bromide by transfer of cationite KU-2-8chs from H⁺- form into Ca⁺- form. After that, calcium is desorbed from cationite with hydrobromic acid, which is obtained by interaction of bromine with water solution of reducing agent, represented by ammonia derivative. Calcium chloride solution is also used to obtain calcium carbonate.

EFFECT: invention makes it possible to obtain calcium hypochlorite, calcium bromide and calcium carbonate in addition to lithium compounds, bromine and magnesium oxide from brines of magnesium-calcium chloride type with application of reagents, obtained from the same brine.

3 cl, 3 dwg, 10 ex