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8333908 
Journal Article 
INFLUENCE OF PHASE COMPOSITION ON EXTRACTION BY DIHEXYLPHOSPHORIC ACID 
Egorov, VV; Starobinets, LG; Koleshko, LV 
1987 
Yes 
Journal of Applied Chemistry of the USSR
ISSN: 0021-888X 
PLENUM PUBL CORP 
NEW YORK 
60 
4 pt 2 
840-844 
English 
WOS:A1987L939000013 
The distribution constants of dihexylphosphoric acid in binary phase extraction systems of the type water-organic solvent miscible in it (the polar phase)-hexane solution of trihexyl phosphate (nonpolar phase). The dimerization constants of the acid in the nonpolar phase were calculated from the concentrational dependences of the distribution coefficients. It is shown that change in the degree of hydration of the polar phase and dilution of trihexyl phosphate by hexane has a great influence on the extractability of dihexylphosphoric acid. This can be used to select conditions for the preparative separation of dihexylphosphoric acid from trihexyl phosphate solutions.