交互四元体系Na^+,K^+∥Br^-,SO_4^(2-)-H_2O 323K相平衡理论计算  

Theoretical calculations of phase equilibrium in interactive quaternary system Na^+,K^+∥Br^-,SO_4^(2-)-H_2O at 323K

作　　者：曾晓晓[1,2] 桑世华[1,2] 王丹[1,2] 张俊杰[1,2] 

机构地区：[1]成都理工大学材料与化学化工学院,四川成都610059 [2]成都理工大学矿产资源化学四川省高校重点实验室,四川成都610059

出　　处：《化学工程》2012年第5期32-35,45,共5页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(40973047);教育部新世纪优秀人才资助计划项目(NCET-07-0125);四川省杰出青年学科带头人培养资助计划项目(08ZQ026-017)

摘　　要：应用323 K三元子体系的溶解度数据,采用多元线性回归方法拟合出该四元体系在323 K时的Pitzer方程的混合离子相互作用参数θ(Br-,SO24-),Ψ(Na+,Br-,SO24-),Ψ(K+,Br-,SO24-)(相关文献鲜有报道),在此基础上应用Pitzer方程对323 K四元体系Na+,K+∥Br-,SO24--H2O的溶解度数据进行理论计算,并用计算出的溶解度数据绘制出四元相图。计算结果表明,模拟计算值与实测值基本吻合,较好地验证了实验数据的准确性,同时也表明含有合理参数的Pitzer模型完全可以描述含Na+,K+∥Br-,SO24--H2O的体系。Using the stable equilibrium solubilities data of the ternary systems at 323 K, the mixing ion-interaction parameters of Pitzer＇s equation θ（Br-,SO24-）,Ψ（Na＋,Br-,SO24-）, and Ψ（K＋,Br-,SO24-） were fitted by multiple linear regression method, which were rarely reported in the related literatures. The solubilities of phase equilibrium in the quaternary system Na＋,K＋∥Br-,SO4（2-）-H2O 323K were calculated by Pitzer＇s equation, and the phase diagram was plotted. The results show that the calculated values have a good agreement with the measured data, and it can demonstrate the accuracy of the measured data. It also shows that the reasonable parameters of Pitzer model can be used in aqueous salt system Na＋,K＋∥Br-,SO24--H2O.

关 键 词：水盐体系 PITZER理论 溶解度 PITZER参数 

分 类 号：O642.42[理学—物理化学]