氯化镁-乙醇-水三元体系的相平衡研究  

Study on the phase equilibrium of magnesium chloride-ethanol-water ternary system

作　　者：杨吉民[1] 刘国玉[1] 张润芝[1] 孙爱德[1] 王萱[1] 王志奎[1] 

机构地区：[1]山东临沂师范学院,山东临沂276005

出　　处：《无机盐工业》2008年第1期20-21,31,共3页Inorganic Chemicals Industry

基　　金：临沂师范学院科技基金项目(XJS04064)

摘　　要：采用等温溶解平衡法研究了20℃时氯化镁-乙醇-水三元体系的平衡溶解度及饱和溶液的折光率和密度,并且绘制了20℃时氯化镁-乙醇-水体系的三元相图。用多元线性回归程序对溶液的折光率、密度及氯化镁的饱和溶解度与液相中乙醇含量之间的关系进行关联,并且计算了乙醇对于氯化镁水溶液的盐析率。体系没有产生分层现象,没有新化合物生成。给出的氯化镁-乙醇-水三元体系的相平衡数据,不仅为溶液化学提供了基础热力学数据,而且为氯化镁的分离纯化和萃取提供了依据。The equilibrium solubility of magnesium chloride - ethanol - water （ MgCl2 - C2 H5 OH - H2O ） ternary system and the refractive index and density of saturated solution have been investigated by isothermal equilibrium method at 20 ℃. The ternary phase diagrams of MgCl2 - C2H5OH - H2O ternary system at 20 ℃ were drawn. The relations between the saturated solubility of MgCl2,refractive index and density of the saturated solution and the alcohol content in the liquid phase were evaluated by multiple linear regression analysis algorithm. The salting - out rate of MgCl2 solution aginst ethanol were calculated. No demixing phenomena were observed and no new compounds were found in the ternary system. A series of phase equilibrium data of MgCl2 - C2 H5 OH - H2O ternary system were given out, which not only provided basic thermodynamic data for solution chemistry, but also provided the foundation for purification and extraction of MgCl2.

关 键 词：氯化镁 乙醇 三元体系 相平衡 溶解度 

分 类 号：TQ132.2[化学工程—无机化工]