带固溶体的水盐体系相平衡热力学关联  

Thermodynamics Correlation of the Phase Equilibrium for the Brine-Salt System Containing Solid Solution

作　　者：任宝山[1] 曹吉林[1] 

机构地区：[1]河北工业大学化工学院,天津300130

出　　处：《高校化学工程学报》2003年第2期119-122,共4页Journal of Chemical Engineering of Chinese Universities

摘　　要：对带固溶体的 MX-NX-H2O三元体系,提出了计算固溶体组份的活度系数公式 ln gi = ai―bixi1/3+sixi4/3。在固相组份不完全互溶时,给出了描述固相活度系数的关系式。利用该关系式,只需一个参数(如一个组份无限稀的活度系数),即可推算出液固相平衡数据。以NH4Cl-KCl-H2O三元体系为例,推算得出的结果与实测数据能很好吻合, 平均相对误差为 3.67%。A formula, In γi=αi - bixi1/3 + sixi4/3, for calculating the activity coefficient of solid solution in the ternary system MX-NX-H2O containing solid solution was proposed. When solid ingredients can not be dissolved completely each other in solid solution, an equation, which is used for describing the activity coefficient of solid phase, was also given. The liquid-solid phase equilibrium data could be calculated by using this equation with one parameter (such as one component activity coefficient in infinitely dilute solution). Taking NH4Cl-KCl-H2O ternary system as an example, the calculated values agree well with the experimental data and the relatively average error is 3.67%.

关 键 词：固溶体 电解质溶液 相平衡 活度系数 氯化铵 氯化钾 

分 类 号：O642.42[理学—物理化学]