FIELD: regeneration of electrolytes; removal of calcareousness from waste alkali electrolyte at simultaneous production of aqueous solution of hydroxide of alkali metal, for example potassium of high degree of purification and dry potash. SUBSTANCE: proposed plant includes electrodialyzer consisting of anode and cathode connected to DC source of anode and cathode chambers separated by cation membrane, catholyte and anolyte tanks, tank-carbonizer, evaporator, condenser, pumps for delivery of catholyte, anolyte and carbonizing solution, cut-off valve and carbon dioxide supply main. EFFECT: waste-free process. 1 dwg
