Host: The Society of Chemical Engineers, Japan
The solubilities of lithium chloride in water vapor were measured at temperatures from 623 K to 673 K and pressures from 7 MPa to 10 MPa by using a flow type apparatus. It was designed and constructed to measure the solubilities of inorganic salts in water vapor at high temperatures and pressures. The solubilities of lithium chloride increase as increasing temperature at constant pressure and are considerably different from those of sodium chloride and potassium chloride. The solubilities of sodium chloride and potassium chloride decrease as increasing temperature at constant pressure. The phase condition of water + sodium chloride and water + potassium chloride systems seems to be solid-gas equilibrium, and the solubilities of these salts decrease with decreasing density of water as increasing temperature. On the other hand, the phase condition of water + lithium chloride may be vapor-liquid equilibrium judging from the tendency on the solubility. The effects of cation(Na+,K+,Li+) type on the solubilities were discussed for these systems. Specific changes in solubilities near critical temperature of water cannot be observed for these salts. Futhermore, the solubilities of lithium chloride were correlated by the equation of state proposed by Hovey et al. The calculated results are in good agreement with the experimental data.
