高校化学工程学报2017，Vol.31Issue(3)：515-520,6.DOI:10.3969/j.issn.1003-9015.2017.00.012
0℃时NH4Cl-MgCl2-KCl-H2O四元体系相平衡研究及应用
Solid-Liquid Equilibrium of the NH4Cl-MgCl2-KCl-H2O System at 0℃ and its Application
摘要
Abstract
Ammonium chloride was used as a salting-out agent to separate magnesium chloride and potassium chloride for application of magnesium chloride and potassium chloride in salt lakes. Phase diagram of the NH4Cl-MgCl2-KCl-H2O quaternary system at 0℃ was studied isothermally. There are seven invariant points and eight solid phase crystallizing fields, which are: MgCl2·6H2O, KCl, NH4Cl, KCl·MgCl2·6H2O, NH4Cl·MgCl2·6H2O, (K1-n,NH4n)Cl, (NH4n,K1-n)Cl and (NH4n,K1-n)Cl·MgCl2·6H2O. Salt addition considerably enlarges crystallization areas of KCl and NH4Cl·MgCl2·6H2O. A new process to produce ammonium carnallite is designed based on the phase diagram, which can be used in the production of anhydrous magnesium chloride.关键词
相平衡/光卤石/氯化铵/铵光卤石Key words
phase equilibrium/carnallite/ammonium chloride/ammonium carnallite分类
化学化工引用本文复制引用
王硕,赵斌,郭宏飞,白童鹿,曹吉林..0℃时NH4Cl-MgCl2-KCl-H2O四元体系相平衡研究及应用[J].高校化学工程学报,2017,31(3):515-520,6.基金项目
国家自然科学基金(21576066). （21576066）
