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Na+,K+//Br-,SO42--H2O四元体系323 K相平衡研究
引用本文:桑世华,孙明亮,李 恒,张 晓,张凯杰.Na+,K+//Br-,SO42--H2O四元体系323 K相平衡研究[J].无机化学学报,2011,27(5):845-849.
作者姓名:桑世华  孙明亮  李 恒  张 晓  张凯杰
作者单位:成都理工大学材料与化学化工学院,成都,610059
基金项目:国家自然科学基金(No.40973047); 四川省杰出青年学科带头人培养资助计划(No.08ZQ026-017); 教育部新世纪优秀人才资助计划(No.NCET-07-0125)资助项目
摘    要:采用等温溶解平衡法研究了四元体系Na+,K+//Br-,SO42--H2O在323 K的相平衡关系,测定了该体系323 K的溶解度及平衡液相的密度,绘制了该体系的相图。研究发现:平衡体系存在复盐钾芒硝Na2SO4·3K2SO4的结晶区。其相图由3个共饱和点,7条单变量曲线和5个结晶区组成。相区分别对应NaBr·2H2O、Na2SO4、K2SO4、KBr和Na2SO4·3K2SO4结晶区。其中复盐钾芒硝Na2SO4·3K2SO4,Na2SO4和K2SO4有较大结晶区,而NaBr·2H2O和KBr有较小结晶区。对比了等温条件下四元体系Na+,K+//Cl-,SO42--H2O相平衡结果。实验结果表明溴化物对硫酸盐有较强盐析作用。

关 键 词:水盐体系    相平衡    溶解度    钾芒硝    硫酸盐

A Study on Equilibria of the Quaternary System Na+, K+//Br-, SO42--H2O at 323 K
SANG Shi-Hu,SUN Ming-Liang,LI Heng,ZHANG Xiao and ZHANG Kai-Jie.A Study on Equilibria of the Quaternary System Na+, K+//Br-, SO42--H2O at 323 K[J].Chinese Journal of Inorganic Chemistry,2011,27(5):845-849.
Authors:SANG Shi-Hu  SUN Ming-Liang  LI Heng  ZHANG Xiao and ZHANG Kai-Jie
Institution:College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China,College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China,College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China,College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China and College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
Abstract:An experimental study on equilibria at 323 K in the quaternary system Na+,K+//Br-,SO42--H2O was done by isothermal equilibrium method.The equilibrium solubilities and densities of the solution were determined experimentally.Using the experimental data,the equilibrium phase diagrams were plotted,respectively.The experimental results of the equilibria show that the double salt Na2SO4.3K2SO4 forms in the quaternary system Na+,K+//Br,SO42--H2O at 323 K.In the phase diagram,the quaternary system at 323 K has thr...
Keywords:salt-water system  phase equilibrium  solubility  glaserite  sulfate
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