METHOD FOR ADDITIONAL SATURATION AND TREATMENT OF NATURAL GROUND LIQUOR FR OM IMPURITY OF CALCIUM AND MAGNESIUM IONS

摘要

FIELD: electrochemical industry. SUBSTANCE: invention is designated for preparing the purified liquor (sodium chloride solution) used for electrolytic manufacturing chlorine and sodium hydroxide. The natural ground liquor is mixed with backward liquor obtained in dissolving sodium chloride precipitating in evaporation of electrolytic alkali in manufacturing chlorine and sodium hydroxide in the ratio = 1:(3-5). Invention provides the attainment of additional saturation of natural liquor containing up to 165 g/dm3 of sodium chloride and 20 g/dm3 of calcium and magnesium ions being with the simultaneous purification from calcium and magnesium ions. EFFECT: improved saturating and purifying method. 3 cl, 4 ex