Liquid-solid Equilibria in Quinary System Na+, K+, Mg2+//Cl-, NO3--H2O at 25℃

›› 2011, Vol. 19 ›› Issue (1): 101-107.

Liquid-solid Equilibria in Quinary System Na⁺, K⁺, Mg²⁺//Cl^-, NO₃^--H₂O at 25℃

黄雪莉, 李松菀

College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China

收稿日期:2010-07-08 修回日期:2010-10-15 出版日期:2011-02-28 发布日期:2011-02-28
通讯作者: HUANG Xueli, E-mail: xuelih@163.com
基金资助:
Supported by the National Natural Science Foundation of China(20466003,20866008)

Liquid-solid Equilibria in Quinary System Na⁺, K⁺, Mg²⁺//Cl^-, NO₃^--H₂O at 25℃

HUANG Xueli, LI Songwan

College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China

Received:2010-07-08 Revised:2010-10-15 Online:2011-02-28 Published:2011-02-28
Supported by:
Supported by the National Natural Science Foundation of China(20466003,20866008)

摘要/Abstract

摘要： The solubilities of the quinary system Na⁺,K⁺,Mg²⁺//Cl,NO₃^--H₂O and its two quaternary subsystems, Na⁺,K⁺,Mg²⁺//NO₃^--H₂O and K⁺,Mg²⁺//Cl,NO₃^--H₂O,were studied by isothermal method at 25℃ and their phase diagrams were plotted.In the equilibrium phase diagram of quaternary system Na⁺,K⁺,Mg²⁺//NO₃^--H₂O, there are one invariant point,three univariant curves and three regions of crystallization with one salt:NaNO₃, KNO₃ and Mg(NO₃)2·6H₂O.In the equilibrium phase diagram of quaternary system K⁺,Mg²⁺//Cl,NO₃^--H₂O,there are three invariant points,seven univariant curves and five regions of crystallization with one salt:KNO₃,KCl, Mg(NO₃)2·6H₂O,MgCl₂·6H₂O and KCl·MgCl₂·6H₂O.In the equilibrium phase diagram of the quinary system Na⁺, K⁺,Mg²⁺//Cl,NO₃^--H₂O,there are four invariant points,and seven regions of crystallization with one salt:NaCl, KCl,NaNO₃,KCl·MgCl₂·6H₂O,KNO₃,MgCl₂·6H₂O and Mg(NO₃)2·6H₂O.

关键词: quinary system, phase equilibrium, nitrate, solubility

Abstract: The solubilities of the quinary system Na⁺,K⁺,Mg²⁺//Cl,NO₃^--H₂O and its two quaternary subsystems, Na⁺,K⁺,Mg²⁺//NO₃^--H₂O and K⁺,Mg²⁺//Cl,NO₃^--H₂O,were studied by isothermal method at 25℃ and their phase diagrams were plotted.In the equilibrium phase diagram of quaternary system Na⁺,K⁺,Mg²⁺//NO₃^--H₂O, there are one invariant point,three univariant curves and three regions of crystallization with one salt:NaNO₃, KNO₃ and Mg(NO₃)2·6H₂O.In the equilibrium phase diagram of quaternary system K⁺,Mg²⁺//Cl,NO₃^--H₂O,there are three invariant points,seven univariant curves and five regions of crystallization with one salt:KNO₃,KCl, Mg(NO₃)2·6H₂O,MgCl₂·6H₂O and KCl·MgCl₂·6H₂O.In the equilibrium phase diagram of the quinary system Na⁺, K⁺,Mg²⁺//Cl,NO₃^--H₂O,there are four invariant points,and seven regions of crystallization with one salt:NaCl, KCl,NaNO₃,KCl·MgCl₂·6H₂O,KNO₃,MgCl₂·6H₂O and Mg(NO₃)2·6H₂O.

Key words: quinary system, phase equilibrium, nitrate, solubility

黄雪莉, 李松菀. Liquid-solid Equilibria in Quinary System Na⁺, K⁺, Mg²⁺//Cl^-, NO₃^--H₂O at 25℃[J]. , 2011, 19(1): 101-107.

HUANG Xueli, LI Songwan. Liquid-solid Equilibria in Quinary System Na⁺, K⁺, Mg²⁺//Cl^-, NO₃^--H₂O at 25℃[J]. , 2011, 19(1): 101-107.

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Liquid-solid Equilibria in Quinary System Na⁺, K⁺, Mg²⁺//Cl^-, NO₃^--H₂O at 25℃

Liquid-solid Equilibria in Quinary System Na⁺, K⁺, Mg²⁺//Cl^-, NO₃^--H₂O at 25℃

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