三元体系NaCl+NH_4Cl+H_2O 323.15K介稳相关系研究  

Metastable phase equilibrium in the ternary system NaCl+NH_4Cl+H_2O at 323.15 K

作　　者：姜东波[1] 曾英[1,2] 于旭东[1] 

机构地区：[1]成都理工大学材料与化学化工学院,四川成都610059 [2]矿产资源化学四川省高校重点实验室,四川成都610059

出　　处：《应用化工》2013年第4期599-601,共3页Applied Chemical Industry

基　　金：国家自然科学基金(41173071);高等学校博士学科点专项科研基金资助课题(博导类)(20115122110001);中国地质调查局地质调查项目子题(121201108523)联合资助

摘　　要：采用等温蒸发法研究了三元体系NaCl+NH4Cl+H2O 323.15 K时的介稳相关系,测定了该三元体系323.15 K时的介稳平衡数据及平衡液相的密度、折光率等物化性质,绘制了相应的介稳相图及物化性质组成图。结果表明,323.15 K时,该三元体系为简单共饱和型,无复盐和固溶体生成,其介稳相图由1个三元共饱点(E)、2条单变量线和2个结晶相区组成,其中NH4Cl的相区较大,NaCl的相区较小。平衡液相的物化性质随液相组成的变化呈现规律性变化。An experimental study on metastable phase equilibrium in the ternary system NaCl ＋ NH4Cl ＋ H2O at 323.15 K was done by an isothermal evaporation method. The solubilities and physieochemical properties such as densities and refractive indices of the equilibrated solution were determined experimentally. The metastable phase diagram and physicochemical properties vs composition diagrams of the ternary system were plotted. Results show that the ternary system is a simple eutectie type, no double salt or solid solution formed at 323.15 K. In the metastable phase diagram,there are one invariant point,two univariant curves, and two crystallization regions. The crystallization regions correspond to single salts sodium chloride （NaCl） and ammonium chloride （NH4Cl）, respectively. The crystallization field of salt NH4 Cl is larger at 323.15 K,while the crystallization region of salt NaCl is smaller at 323.15 K. The physicochemical properties of the ternary system change regularly with the changes of composition in aqueous solutions.

关 键 词：介稳相平衡 氯化氨 等温蒸发 三元体系 

分 类 号：O642[理学—物理化学]