四元体系K~+∥Cl~-、SO_4~(2-)、B_4O_7~(2-)-H_2O 298K相平衡的理论计算 |
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引用本文: | 胡富铭,桑世华,张勇刚,张俊杰.四元体系K~+∥Cl~-、SO_4~(2-)、B_4O_7~(2-)-H_2O 298K相平衡的理论计算[J].海湖盐与化工,2012(9):12-14,17. |
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作者姓名: | 胡富铭 桑世华 张勇刚 张俊杰 |
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作者单位: | [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 |
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基金项目: | 国家自然科学基金资助项目(No.40973047)和四川省青年科技基金资助计划(No.08ZQ026-017)资助项目 |
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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。
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关 键 词: | 水盐体系 Pitzer方程 溶解度 Pitzer参数 |
Theoretical Calculation of Phase Equilibrium for Quaternary SystemK~+∥Cl~-、SO_4~(2-)、B_4O_7~(2-)-H_2O 298K |
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Affiliation: | HU Fu - ming1'2, SANG Shi - hua1'2, ZHANG Yong - gang1'2, ZHANG Jun - jie1'2 (1. Material and Chemistry Chemical Engineering School, Chengdu University of Technology, Chengdu, Sichuan 610059, China. 2. the Key Laboratory of Sichuan Colleges and Universities of Mineral Resource Chemistry, Chengdu, Sichuan 610059,China) |
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Abstract: | 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. |
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Keywords: | salt - water system Pitzar equation solubility Pitzar parameter |
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