METHOD OF EXTRACTION OF SALTS FROM SOLUTIONS Russian patent published in 1995 - IPC

FIELD: cleaning of solutions through crystallization. SUBSTANCE: extraction of salts from solutions through crystallization at evaporation is effected after separation of solution into two flows by nanofiltration whose compositions lie on isothermal section of diagram of phase equilibrium of system being treated on different sides of beam of crystallization of eutonic composition solution. Mother liquors obtained after crystallization of salts are returned to cycle. EFFECT: more complete and enhanced extraction of salts from solutions. 2 cl, 5 dwg, 1 tbl