摘要
采用差示扫描量热法,通过对一系列“拟二元”物系固液平衡数据的测定,得到了邻二溴苯、间二溴苯和对二溴苯三元物系的固液平衡数据。实验结果表明本物系为简单低共熔型,其低共熔摩尔分数组成和温度分别为:邻二溴苯(x1)+间二溴苯(x2)+对二溴苯(x3),x1=0.4259,x2=0.5345,x3=0.0396,Teu=238.5K。文中绘制出了其相应的低共熔三元固液平衡相图,并采用正规溶液模型,利用二元溶液的三个相互作用参数对实验数据进行了关联,温度均方根偏差仅为1.32K,说明正规溶液模型适用于上述弱极性异构体三元物系固液平衡的计算。
The solid-liquid equilibrium data for the ternary mixture of o-dibromobenzene ＋ m-dibromobenzene ＋ p-dibromobenzene were determined by differential scanning calorimetry （DSC）. It was performed through the method of determining the solid-liquid equilibrium data for the pseudo-binary solution. The solid-liquid equilibrium data of o-dibromobenzene （x1） ＋ m-dibromobenzene （x2） ＋ p-dibromobenzene （x3） obtained from the experiments show that this ternary mixture is an eutectic system at x1 = 0.4259, x2 = 0.5345, x3 = 0.0396, and Tcu = 238.5K. The corresponding eutectic type phase diagram was also presented. With the adjustable parameters for binary mixture systems of dibromobenzenes, the regular solution model was extended to correlate the solid-liquid equilibrium data of ternary mixture system and the root mean square deviation of temperature is only 1.32K. It implicates that the regular solution model predicts the solid-liquid equilibrium for the ternary mixture systems of non-polar isomers with fair accuracy.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2007年第1期5-8,共4页
Journal of Chemical Engineering of Chinese Universities
关键词
固液平衡
相图
邻二溴苯
间二溴苯
对二溴苯
差示扫描量热法
正规溶液模型
solid-liquid equilibrium
phase diagram
o-dibromobenzene
m-dibromobenzene
p-dibromobenzene
differential scanning calorimetry （DSC）
regular solution model
