Phase diagram for the hexane-[Y(NO3)3(TBP)3]-acetonitrile liquid ternary

A phase diagram for the hexane-Y(NO₃)₃(TBP)₃]-acetonitrile (1-2-3) liquid ternary at T = 298.15 K was studied. This ternary consists of two pairs of incompletely miscible liquids (hexane-acetonitrile and Y(NO₃)₃(TBP)₃]-hexane). It contains two homogeneous liquid fields and one two-phase liquid field. One phase is depleted of acetonitrile and contains variable proportions of Y(NO₃)₃(TBP)₃] and hexane; the other contains variable proportions of acetonitrile and Y(NO₃)₃(TBP)₃] and small proportions of hexane. Intermolecular interaction parameters and excess Gibbs energies g ^E were calculated for binaries and the liquid ternary along binodal curves proceeding from miscibility data for the Y(NO₃)₃(TBP)₃]-hexane and hexane-acetonitrile binaries and the liquid ternary and using equations of the NTRL model. For the liquid ternary, g ^E > 0.g ^E decreases in the following order of pairs of liquids: (1, 3), (1, 2), (2, 3). A computer algorithm is given for calculating binodal curves and tie-lines for the liquid ternary with the use of equations of the NTRL model proceeding from the intermolecular interaction parameters. Original Russian Text ? A.K. Pyartman, V.A. Keskinov, N.A. Charykov, 2009, published in Zhurnal Neorganicheskoi Khimii, 2009, Vol. 54, No. 2, pp. 350–356.