H^+,Ca^(2+)//SO_4^(2-),C_2O_4^(2-)—H_2O相互四组元体系固液相平衡

The Phase Equilibrium for H^+ ,Ca^(2+)//SO_4^(2-),C2O_4^(2-)——H_2O Systems

本文用等温法测定了15℃和25℃时H^+L,Ca^(2+)//SO_4^(2+),C_2O_4^(2+)-H2O体系的固液相平衡数据;用Pitzer电解质溶液理论导出了体系中各粒子的活度系数模型,计算了25℃时体系的固液相平衡数据。计算值与实验值吻合得较好。

The data of phase equilibrium for H^+ ,Ca^(2+)//SO_4^(2-),C_2O_4^(2-)--H_2O systems at 15 C and 25 C have been measured. The activity coefficient models of various particles have been developed by the Pitzer's electrolitic solution theory. The data of the solid-liquid phase equilibrium for the system at 25C have been calculated with the models above. The calculated results are in good agreement with the experimental values. These results are important to the production of oxalic acid.