| 三元体系NH4Cl+MgCl2+H2O 323.2 K相平衡研究 |
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| 引用本文： | 陈帅,杨博,陈念粗,罗军,任思颖,曾英,于旭东.三元体系NH4Cl+MgCl2+H2O 323.2 K相平衡研究[J].无机盐工业,2022,54(4):100-103. |
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| 作者姓名： | 陈帅 杨博 陈念粗 罗军 任思颖 曾英 于旭东 |
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| 作者单位： | 1.成都理工大学材料与化学化工学院,四川成都 6100592.矿产资源化学四川省高等学校重点实验室 |
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| 基金项目： | 四川省科技厅应用基础面上项目(2017JY0191);四川省大学生创新创业训练计划项目(202110616004) |
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| 摘 要： | 采用等温溶解平衡法开展了323.2 K时三元体系NH4Cl+MgCl2+H2O的相平衡研究,测定了平衡固液相组成及密度,并绘制了该三元体系相图。研究发现：该体系323.2 K时有复盐NH4Cl·MgCl2·6H2O生成,相图包含2个共饱点（F1、F2）、3条单变量曲线（AF1、F1F2、F2B）、3个结晶区（NH4Cl、MgCl2·6H2O、NH4Cl·MgCl2·6H2O）。对比该体系273.2、298.2、323.2 K时的相图可知：随着温度升高,NH4Cl和MgCl2·6H2O结晶区变小,NH4Cl·MgCl2·6H2O结晶区变大,同时NH4Cl·MgCl2·6H2O由不相称复盐转变为相称复盐,对应的不相称共饱点转变为相称共饱点。
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| 关 键 词： | 相平衡 三元体系 溶解度 铵光卤石 |
| 收稿时间： | 2021-06-18 |
Study on phase equilibria of ternary system NH4Cl+MgCl2+H2O at 323.2 K |
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| CHEN Shuai,YANG Bo,CHEN Niancu,LUO Jun,REN Siying,ZENG Ying,YU Xudong.Study on phase equilibria of ternary system NH4Cl+MgCl2+H2O at 323.2 K[J].Inorganic Chemicals Industry,2022,54(4):100-103. |
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| Authors: | CHEN Shuai YANG Bo CHEN Niancu LUO Jun REN Siying ZENG Ying YU Xudong |
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| Affiliation: | 1. College of Materials and Chemistry & Chemical Engineering,Chengdu University of Technology,Chengdu 610059,China2. Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institution |
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| Abstract: | The stable phase equilibria of the ternary system NH4Cl+MgCl2+H2O was determined by isothermal dissolution equilibrium method at 323.2 K.The density,equilibrium composition solid and liquid phase were determined and the phase diagram of the ternary system was plotted.The results showed that double salt NH4Cl·MgCl2·6H2O was formed at 323.2 K,and its phase diagram consisted of two invariant points（F1,F2）,three univariate curves（AF1,F1F2,F2B） and three crystallization zones（NH4Cl,MgCl2·6H2O,NH4Cl·MgCl2·6H2O）.By comparing the phase diagrams at 273.2,298.2,323.2 K,it could be found that with the increase of temperature,the crystallization zones of NH4Cl and MgCl2·6H2O becomed smaller,the crystallization zone of NH4Cl·MgCl2·6H2O becomed larger.Meanwhile,the type of double salt NH4Cl·MgCl2·6H2O changed from the incommensurate to the commensurate type,therewith,the corresponding incommensurate invariant point changed to the commensurate type. |
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| Keywords: | phase equilibria ternary system solubility ammonium carnallite |
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