四元体系K^+∥Cl^-、SO_4^(2-)、B_4O_7^(2-)-H_2O 298K相平衡的理论计算  

Theoretical Calculation of Phase Equilibrium for Quaternary System K^+∥Cl^-、SO_4^(2-)、B_4O_7^(2-)-H_2O at 298 K

作　　者：胡富铭[1,2] 桑世华[1,2] 张勇刚[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]矿产资源化学四川省高校重点实验室,四川成都610059

出　　处：《盐业与化工》2012年第9期12-14,17,共4页Jounral of Salt and Chemical Industry

基　　金：国家自然科学基金资助项目(No.40973047);四川省青年科技基金资助计划(No.08ZQ026-017)资助项目

摘　　要：采用298 K时三元子体系K+∥SO42-、B4O72--H2O 298 K的相平衡溶解度,应用多元线性回归的方法拟合了该体系中Pitzer方程所需盐的混合离子作用参数ΨK,B4O7,SO4;并且运用Pitzer方程对298 K时四元体系K+∥Cl-、SO42-、B4O72--H2O溶解度数据进行了理论计算。根据计算出的溶解度数据绘制出四元体系计算相图,从相图中得知,该四元体系有一个共饱点,三条单变曲线,及三个结晶区平衡固相。研究结果发现,模拟计算值与实测值基本吻合。Using the phase equilibrium solubility data of ternary system K~//SO^- , B40^- - H20 at 298 K, the mixing - interaction parameter WK ~ ,SO^- ,B40^- in Pitzer equations is fitted by multiple linear regression method. The theoretical calculation of solubility data for quaternary system K~//C1- ,SO^- ,B40^- - H20 at 298 K is done using Pitzer equation. The phase diagram with quaternary system is drawn out according to solubility data. Some conclusions can be drawn from the phase diagram： there are one invariant point, three univariant curves and three fields of crystallization in the quaternary system. The results show that the simulated calculation data have a good agreement with the measured data.

关 键 词：水盐体系 PITZER方程 溶解度 PITZER参数 

分 类 号：O642.542[理学—物理化学]