Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Solid liquid equilibria of dicarboxylic acids for binary mixtures nonanedioic acid (1) + 3-methylheptanedioic acid (2) (eutectic temperature TE = 342.25 K, eutectic composition x1E = 0.364); nonanedioic acid (1) + 2,2-dimethylbutanedioic acid (2) (TE = 367.51 K, x1E = 0.653); nonanedioic acid (1) + 2,3-dimethylbutanedioic acid (2) (TE = 354.27 K, x1E = 0.463); decanedioic acid (1) + 3-methylheptanedioic acid (2) (TE = 352.47 K, x1E = 0.134); decanedioic acid (1) + 2,2-dimethylbutanedioic acid (2) (TE = 384.38 K, x1E = 0.483); and decanedioic acid (1) + 2,3-dimethylbutanedioic acid (2) (TE = 365.38 K, x1E = 0.192) are measured using differential scanning calorimetry (DSC) and correlated using the Clarke Glew equation in this study. Simple eutectic phase diagrams for these systems are observed. The experimental results are correlated using the Wilson and nonrandom two-liquid (NRTL) activity coefficient models, and satisfactory results are presented.