Physico-chemical study of extraction systems by the method of solubility diagrams

Method for mathematical description of liquid-loquid and liquid-liquid-solid equilibria was developed. The method was used to evaluate phase state of systems, containing inorganic acids (HCl, HNO3, H2SO4, H3PO4, H3BO3), alkali and alkaline earth metal salts, water and neutral extractions (ketones, alcohols, N,N-dialkylamides). Composition of extracted complexes could be determined from the phase diagrams. The data obtained enabled to conclude that suggested approach was more informative than other methods, because it permitted to estimate the whole statics of the extraction process and determine the composition of coexisting phases without their isolation and separate investigation