METHOD OF COMPLEX PURIFICATION OF AQUEOUS SOLUTIONS OF METAL CHLORIDES FROM IRON AND SULPHATE ION IMPURITIES

摘要

FIELD: chemistry.;SUBSTANCE: aqueous solutions of metal chlorides are successively treated with an oxidant and a calcium chloride source and/or barium chloride source with molar ratio of oxidant and divalent iron ions in the range (0.95-1.90):1.0 and molar ratio of calcium chloride and/or barium chloride and sulphate ions in the range (0.9-1.1):1.0 with subsequent coprecipitation of a hydrate of iron (III) oxide and calcium sulphate and/or barium sulphate at pH of the reaction medium between 5.0 and 9.5 and separation of the liquid and solid phase of the suspension.;EFFECT: invention increases degree of purification of solutions, efficiency of the process and allows for carrying out the process in continuous mode.;14 cl, 1 tbl, 5 ex