Phase Diagram of the Quaternary System Sodium Sulfate + Sodium Chloride + Hydrogen Peroxide + Water and Its Subsystems: Experimental Data

Abstract

Phase diagrams of the quaternary system sodium sulfate + sodium chloride + hydrogen peroxide + water and its subsystems sodium chloride + hydrogen peroxide + water, sodium sulfate + hydrogen peroxide + water, and sodium sulfate + sodium chloride + water were studied at a temperature of 288.15 K using the moist method. In this paper, the solubility data, the densities, and the refractive indexes of the liquid phase of the quaternary system and its subsystems were measured. The phase diagrams of these systems were constructed, and there are four solid phases in the diagrams. The quaternary phase diagram includes two cosatured points, five univariant curves, and four crystallization regions corresponding to NaCl, Na2SO4·10H2O, Na2SO4·0.5H2O2·H2O, and 4Na2SO4·2H2O2·NaCl.