平均球近似法预测电解质水溶液的固-液平衡  

Prediction of Solid liquid Equilibria for Mixed Electrolyte Aqueous by the Modified Mean Spherical Approximation

作　　者：于养信[1] 高光华[1] 陆九芳[1] 李以圭[1] 

机构地区：[1]清华大学化学工程系

出　　处：《高校化学工程学报》1997年第4期343-348,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金

摘　　要：以溶解反应平衡常数为电解质水溶液的固－液平衡判据，应用改进的平均球近似法，使用由单一电解质水溶液活度系数数据得到的参数，在不用任何混合参数的情况下，对七个混合电解质水溶液体系在２９８．１５Ｋ时的固－液平衡进行预测，其结果能很好地与溶解度的实验值相符合。另外，还预测了不同温度下电解质水溶液的固－液平衡，结果令人满意。Inorganic salt solubilities in ternary electrolyte mixtures are calculated by using available thermodynamic data for solids and for aqueous electrolyte solutions. The mean ionic activity coefficients in mixed electrolyte solutions at saturated concentrations have been predicted by using the modified mean spherical approximation (MSA) without any mixing parameters. Excellent to good agreement with experimental solubilities for ternary mixtures indicates that the modified MSA method can be successfully used to predict solid liquid equilibria for mixed electrolyte aqueous at various temperatures.

关 键 词：电解质水溶液 固液平衡 MSA法 溶解度 

分 类 号：O642.42[理学—物理化学]