Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

ABSTRACT

In this investigation, the mutual solubilities and the density of equilibrium liquid phase for ternary o-nitrobenzoic acid p-nitrobenzoic acid acetone systemwere measured at 283.15K and 313.15 K, respectively. Two isothermal phase diagrams of the system were constructed on the basis of the measured solubilitities, one at 283.15K and the other at 313.15 K. The phase diagrams of the ternary system were similar at the different temperatures. Two solid-phases were formed and confirmed by Schreinemaker s wet residue method, and the twowere identified as o-nitrobenzoic acid and p-nitrobenzoic acid. The crystallization regions of p-nitrobenzoic acid and o-nitrobenzoic acid increase as the temperature decreases. At each temperature, the crystallization of p-nitrobenzoic acid is larger than that of o-nitrobenzoic acid.