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首页> 外文期刊>The Journal of Chemical Thermodynamics >Solid-liquid stable phase equilibria of the quaternary system Na+//Cl-, SO42-, CO32--H2O and its subsystems Na+//Cl-, CO32--H2O and Na+//SO42-, CO32--H2O at 353.15 K
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Solid-liquid stable phase equilibria of the quaternary system Na+//Cl-, SO42-, CO32--H2O and its subsystems Na+//Cl-, CO32--H2O and Na+//SO42-, CO32--H2O at 353.15 K

机译：季铵系统Na + // Cl-，SO42-，CO32 - H2O及其子系统Na + // Cl-，Co32 - H2O和Na + // So42-，Co32 - H2O，Co32 - H2O为353.15 k

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摘要

The solid-liquid phase equilibria of the solution in the quaternary system Na+//Cl-, SO42-, CO32--H2O and its subsystems Na+//Cl-, CO32--H2O and Na+//SO42-, CO32--H2O at 353.15 K were measured by isothermal solution saturation method. The equilibrium solids were determined by the Schreinemaker's method of wet residues and X-ray diffraction (XRD). Based on the experimental data, the phase diagrams were plotted and analysed. There is one monohydrate in the ternary system Na+//CO32-, Cl--H2O at T = 353.15 K, and the phase diagram contains one invariant point, two univariant curves and four crystallization regions. The ternary system Na+//SO42-, CO32--H2O at T = 353.15 K is more complex than the previous system since one monohydrate and one anhydrous double salt are found; the phase diagram contains two invariant points, three univariant curves and six crystallization regions. The phase diagram of the quaternary system Na+//Cl-, SO42-, CO32--H2O at 353.15 K includes two invariant points, five univariant curves, and four crystallization fields of single salts corresponding to NaCl, Na2SO4, Na2CO2 center dot H2O and 2Na(2)SO(4)center dot Na2CO2. The results obtained in this study can help identify the solutions from which fractional crystallization of Na2SO4 and NaCl will be more effective. (C) 2019 Elsevier Ltd.
机译：季铵系统Na + // Cl-，SO42-，CO32 - H2O及其子系统中的固体液相平衡溶液Na + // Cl-，CO32 - H2O和Na + // So42-，Co32 - H2O在353.15K通过等温溶液饱和法测量。平衡固体由SchreInemaker的湿残基和X射线衍射（XRD）测定。基于实验数据，绘制和分析了相图。 Ternary System Na + // Co32-，Cl - H2O在T = 353.15k中有一种单水合物，并且相图包含一个不变点，两个非变性曲线和四个结晶区域。 Ternary System Na + // SO42-，CO32 - H 2 O，T = 353.15K比先前的系统更复杂，因为发现一种单水合物和一种无水双盐;相图包含两个不变点，三个非变量曲线和六个结晶区域。 353.15k的季型系统Na + // Cl-，SO42-，CO32 - H2O的相图包括两个不变焦点，五个单变曲线和对应于NaCl，Na2SO4，Na2CO2中心点H2O和的单个盐的四个结晶场。 2NA（2）所以（4）中心点Na2CO2。本研究中获得的结果可以有助于确定Na 2 SO 4和NaCl的分数结晶将更有效的溶液。 （c）2019年elestvier有限公司

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