The method of flotation concentration, which has in recent years completely revolutionized the utilization of mineral resources, has apparently not yet been applied to the separation of water-soluble salts into their components, since no literature data on this subject are available. The application of the highly efficient flotation method, even to a single case, for simplifying and shortening the lengthy and cumbersome method of fractional crystallization, would provide an impetus for further research in this area, the results of which could greatly simplify the technological process in salt separation.