An Efficient Way of Visualization of Mutual Solubility Data in the Whole Range of Compositions

Abstract

An efficient way or stretching phase diagrams is proposed that represents the whole composition range and reveals details of low-solubility regions. It is based on the transformation of mole fraction x 1 to log10(x 1/x 2) = log10(x 1/(1 – x 1)) for binary mixtures. While the primary application is liquid–liquid and solid–liquid equilibria, the use of this method for other properties may also be beneficial. An extension on ternary mixtures is also discussed.

Reference materials for phase equilibrium studies. 1. Liquid–liquid equilibria (IUPAC Technical Report)

“…Fig. 1: Experimental mole-fraction LLE data (symbols) for aniline (1) + water (2) in a composition-stretched representation [17] vs. the SDS equation (line) [13]. The rejected solubilities of aniline in water from Ref.…”

“…The smoothed LLE solubilities with the corresponding confidence intervals are given in Table 4. 2) in a composition-stretched representation [17] compared with the SDS equation (line) [18]. The data from Ref.…”

“…3). 2) in a composition-stretched representation [17], compared with the evaluation with parameters from Table 5 (line). The rejected data from Ref.…”

“…The smoothed LLE solubilities with the corresponding confidence intervals are given in Table 13. Because accurate extrapolation below 288 K cannot be done on the basis of the available data, the recommended values for this system are restricted to temperatures above 288 K. (2) in a compositionstretched representation [17] compared with the evaluation with parameters from Table 12 (line). The data from [44] are shown as red triangles.…”

“…Fig.3: Experimental mole-fraction LLE data (symbols) for nitromethane (1) + water (2) in a composition-stretched representation[17], compared with the evaluation with parameters from Table5(line). The rejected data from Ref [23].…”