Abstract
ABSTRACT For some aliphatic and aromatic bidentate amines, e.g., ethylenedi-amine derivatives, which were used in the synergistic extraction system, the liquid-liquid partition coefficients (P) were measured between benzene and water phases and discussed together with other aliphatic and aromatic multidentate amines by using the scaled particle theory (SPT). The contributions of three kinds of Gibbs energies, i.e, the cavity formation energy (G¯h), the dispersion energy (G¯dis) and hydrogen-bonding energy (G¯h), to the P values were successfully evaluated. The main factor to determine the P value was G¯h (10–55 kJ/mol) in the aqueous phase, but the contributions of G¯c (6–15 kJ/mol) and G¯dis (6–28 kJ/mol) were not negligibly small.
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