三元水盐体系冰点共晶点温度与溶液组成的关系  

The relationship betweenfreezing point,eutectic point and the composition of solution in ternary salt-water system

作　　者：刘福云[1] 黄雪莉[1] 王雪莹[1] 黄文婷[1] 潘毅[1] LIU Fu - yun HUANG Xue - li WANG Xue - ying HUANG Wen - ting PAN Yi(Key Laboratory of Cleaner Transition of Coal ＆ Chemicals Engineering of Xinjiang Uyghur Autonomous Region, College of Chemistry and Chemical Engineering, Xinjiang University, Xinjiang, Urumqi 83004)

机构地区：[1]新疆煤炭洁净转化与化工过程重点实验室,新疆大学化学化工学院,新疆乌鲁木齐830046

出　　处：《盐科学与化工》2017年第9期23-26,共4页Journal of Salt Science and Chemical Industry

基　　金：国家自然科学基金资助项目(21166022)

摘　　要：文章研究了三元水盐体系溶液的冰点共晶点与溶液组成的关系。针对三个常见的基础三元水盐体系K^+∥Cl^-、NO_3^--H_2O,K^+∥Cl^-、SO_4^(2-)-H_2O和Na^+、K^+∥SO_4^(2-)-H_2O,测定了不同组成下的溶液冰点温度,结合冰盐共晶点,构筑了体系相图冰点面,并通过数学拟合,研究了其形态;借助Matlab软件,建立了上述体系冰点共晶点温度的计算公式。结果表明:冰点共晶点温度与溶液组成呈二次曲面关系;所获得的冰点共晶点计算公式的计算结果与实验值吻合较好。为研究低温条件下的水盐溶液相态变化提供了依据。In this paper,the relationships between freezing points,eutectic pointsand compositions of solutions of ternary salt-water systems,such as K^＋∥Cl^-,NO_3^--H_2O,K^＋∥Cl^-,SO4^2--H_2O and Na^＋,K^＋∥SO4^2--H_2O,have been investigated. The freezing points of these systems have been measured; combining eutectic points,the freezing point surfaces of these systems were constructed,and studied by Matlab software; the formula of predicting the freezing points and eutectic points were obtained. The results show： the relationships between freezing points,eutectic pointsand compositions of solutions are quadric surface; the predictedfreezing points and eutectic points are in good agreement with the experimental ones. This work provides guidance for studying the phase change of the ternary salt-water system at low temperature.

关 键 词：水盐体系 冰点 共晶点 

分 类 号：O645.15[理学—物理化学]