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

ABSTRACT

The mutual solubility for ternary systems of p-nitroacetophenone (1) + m-nitroacetophenone (2) + methanol (3), p-nitroacetophenone (1) + m-nitroacetophenone (2) + toluene (3) and p-nitroacetophenone (1) + m-nitroacetophenone (2) + ethyl acetate (3) was investigated through the steady method at 283.15 K, 298.15 K and 313.15 K under local ambient pressure of 101.2 kPa. The isothermal phase diagrams of the three systems were constructed in terms of the obtained mutual solubility. At the fixed temperature, there were two neat solids formed, namely as neat p-nitroacetophenone and neat m-nitroacetophenone, which were recognized through the Schreinemakers' wet residue method. The crystallization regions of neat p-nitroacetophenone and neat m-nitroacetophenone rised with decreasing temperature. The mutual solubility was correlated through the Wilson and NRTL equations. The relative average deviations for p-nitroacetophenone + m-nitroacetophenone + methanol/toluene/ethyl acetate systems were, respectively, 4.44*10-2, 3.86*10-2 and 3.35*10-2 for NRTL equation; and 4.33*10-2, 2.51*10-2 and 2.29*10-2 for Wilson equation. The acquired solubility data and the ternary phase diagrams for the three systems were very significant for designing and optimizing the purification process of p-nitroacetophenone and m-nitroacetophenone mixtures.