Investigation of the Solubility in the NaVO₃−NaNO₃−H₂O System

Abstract

The solubility of sodium vanadate and sodium nitrate was investigated in the NaVO 3 −NaNO 3 −H 2 O system at the temperature range 293−323 K, with the method of isothermal saturation of a solution. The obtained results gave a basis for the plot of a fragment of the solubility isotherm for the investigated system. That system is a part of the five-component NH 4 NO 3 −NaVO 3 −NH 4 VO 3 −NaNO 3 −H 2 O system and is necessary for plotting the solubility isotherm in the projection according to Janecke method. Knowledge of the course of that isotherm for the five-component system is necessary for determination of the optimal conditions for utilization of the postfiltration liquor from the soda production from NaNO 3 by the Solvay method with the use of NaVO 3 .