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298.16 K Na, K, Mg2+//Cl, NO3-H2O五元体系的相平衡研究
引用本文:黄雪莉,朱丽娟,梁涛,宋彭生.298.16 K Na, K, Mg2+//Cl, NO3-H2O五元体系的相平衡研究[J].化学学报,2007,65(9):798-802.
作者姓名:黄雪莉  朱丽娟  梁涛  宋彭生
作者单位:1. 大连理工大学化工学院,大连,116024;新疆大学化学化工学院,乌鲁木齐,830046
2. 新疆大学化学化工学院,乌鲁木齐,830046
3. 中国科学院青海盐湖研究所,西宁,810008
基金项目:国家自然科学基金(No.20466003)资助项目.
摘    要:采用等温溶解平衡法研究了五元体系Na, K, Mg2+//Cl, NO3-H2O在298.16 K、氯化钠饱和时各盐的溶解度和饱和溶液的物化性质(密度, 电导率)以及四元体系Na, Mg2+//Cl, NO3-H2O的相平衡关系. 研究表明: 在298.16 K, 氯化钠饱和时该五元体系溶解度相图由六个结晶区、九条单变量溶解度曲线和四个零变量点构成, 六个结晶区分别对应于NaNO3+NaCl, KNO3+NaCl, KCl+NaCl, Mg(NO3)2•6H2O+NaCl, MgCl2•6H2O+NaCl和复盐KCl•MgCl2•6H2O+NaCl; 在298.16 K时, 该四元体系的相图由四个结晶区、五条单变量溶解度曲线和二个零变量点构成, 四个结晶区分别对应于NaNO3, NaCl, Mg(NO3)2•6H2O, MgCl2•6H2O.

关 键 词:五元水盐体系  相平衡  物化性质  溶解度
收稿时间:2006-6-6
修稿时间:2006-06-062007-01-04

Study on the Phase Equilibrium for the Quinary System Na+,K+,Mg2+//Cl-,NO-3-H2O at 298.16 K
HUANG,Xue-Li,ZHU,Li-Juan,LIANG,Tao,SONG,Peng-Sheng.Study on the Phase Equilibrium for the Quinary System Na+,K+,Mg2+//Cl-,NO-3-H2O at 298.16 K[J].Acta Chimica Sinica,2007,65(9):798-802.
Authors:HUANG  Xue-Li  ZHU  Li-Juan  LIANG  Tao  SONG  Peng-Sheng
Institution:a School of Chemical Engineering, Dalian University of Technology, Dalian 116024; b College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046; c Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008
Abstract:Solubilities of each salt in the system Na, K, Mg2+//Cl, NO3-H2O saturated with NaCl and the system Na, Mg2+//Cl, NO3-H2O were investigated by isothermal method at 298.16 K. The physico-chemical properties, such as densities and conductivities, of the corresponding solutions were determined too. The dry salt phase diagram of the system Na, K, Mg2+//Cl, NO3-H2O saturated with NaCl consists of six crystallization regions (NaNO3+NaCl, KNO3+NaCl, KCl+NaCl, Mg(NO3)2•6H2O+NaCl, MgCl2•6H2O+NaCl and KCl•MgCl2•6H2O+NaCl), nine univariant curves and four invariant points. The dry salt phase diagram of the system Na, Mg2+//Cl, NO3-H2O consists of four crystallization regions (NaNO3, Mg(NO3)2•6H2O, MgCl2•6H2O and NaCl), five univariant curves and two invariant points.
Keywords:quinary system  phase equilibrium  physicochemical property  solubility
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