三元体系NH4Cl-NaCl-H2O 298 K介稳相平衡研究  

Metastable phase equilibrium in the ternary system NH4Cl-NaCl-H2O at 298 K

作　　者：邬莉婷 李晨 陈鹏 程兴龙 Wu Liting;Li Chen;Chen Peng;Cheng Xinglong(Sichuan Bureau of Geology and Mineral Resources Chengdu Analytical&Testing Center for Mineral and Rocks,Chengdu Sichuan 610081,China;Amber Technology(Tianjin)Co.,Ltd,Tianjin 300350,China;Shanghai Electric Group Co.,Ltd.Central Academe,Shanghai 200070,P.R.China)

机构地区：[1]四川省地质矿产勘查开发局成都综合岩矿测试中心,四川成都610081 [2]琥珀科技(天津)有限公司,天津300350 [3]上海电气集团股份有限公司中央研究院,上海200070

出　　处：《云南化工》2020年第5期39-42,共4页Yunnan Chemical Technology

摘　　要：采用等温蒸发法在298 K对三元体系NH4Cl-NaCl-H2O进行介稳相关系研究,测定该体系在298 K时的折光率、密度等物化性质。根据实验结果,分别绘制了三元体系NH4Cl-NaCl-H2O的介稳相图、物化性质组成图。结果发现,该介稳相图由1个共饱点E,2条单变量曲线(AE、BE)和2个单盐结晶相区构成。此三元体系在298 K没有形成复盐或固溶体,为简单三元体系。对比该三元体系298 K和323 K下的介稳相图发现,盐的结晶形式未发生变化,在氯化钠与氯化铵共存时,降低温度有利于NH4Cl的析出。The isothermal evaporation method was used to study the ternary system NH4Cl-NaCl-H2O at 298 K,and the physical and chemical properties were determined.Results show that the metastable phase diagram contains one ternary invariant point E,two univariant curves(AE,BE),two crystalline phase regions corresponding to single salt NH4Cl and NaCl.The ternary system is a simple type without double salt and solid solution.Comparing the metastable phase diagrams of the ternary system at 298 K and 323 K,it was found that the crystalline form of the salt did not change.When sodium chloride and ammonium chloride coexist,lowering the temperature is beneficial to the precipitation of NH4Cl.

关 键 词：介稳相平衡 氯化钠 氯化铵 298 K 

分 类 号：O658.6[理学—分析化学]