On the influence of the nature of solvents on the extraction of scandium with tributyl phosphate

Analysis of the data on separation of scandium by tributyl phosphate in organic solvents shows that the sufficient connection between distribution coefficients (D) and properties of the organic phase may be obtained only through multiparameter equations of linearity of free energies, during which the factors of basicity and density of cohesion energy decreasing D value, and the factors of polarizability increasing it are important. The studied solvents may be conditionally distributed into two groups by the extracting capability. Isoamyl alcohol resides in the first group, and acetophenon, 1,2-dichlorethane, aromatic hydrocarbons, unsaturated hydrocarbons are presented in the second one