摘要
采用差示扫描量热法测定了邻二溴苯与间二溴苯、对二溴苯与间二溴苯和对二溴苯与邻二溴苯的3个二元固液平衡数据,同时绘制出相应的简单低共熔型二元相图。各物系低共熔摩尔分数组成和温度分别为:邻二溴苯(x)+间二溴苯(1?x),x=0.4485,T=240.4K;对二溴苯(x)+间二溴苯(1-x),x=0.1002,T=260.9K;对二溴苯(x)+邻二溴苯(1?x),x=0.1306,T=272.3K。采用单参数正规溶液模型计算,温度均方根偏差不大于1.1K,说明正规溶液模型适用于上述弱极性异构体物系固液平衡计算.
Solid-liquid equilibrium data for three binary mixtures of o-dibromobenzene + m-dibromobenzene, p-dibromobenzene + m-dibromobenzene, and p-dibromobenzene + o-dibromobenzene were determined by differential scanning calorimetry and their corresponding eutectic type phase diagrams were presented. The eutectics are at x=0.4485, T=240.4 K for the mixture of o-dibromobenzene(x) + m-dibromobenzene (1-x); x=0.1002, T=260.9 K for the mixture of p-dibromobenzene(x) + w-dibromobenzene(1-x); and x=0.1306, T=272.3 K for the mixture of p-dibromobenzene(x) + o-dibromobenzene(1-x). The data were correlated by the regular solution model using only one adjustable binary parameter, and the root mean square deviations of temperature are less than 1.1 K. It implicates that the regular solution model can be used to predict the solid-liquid equilibria for the mixtures of nonpolar isomers with fair accuracy.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2005年第4期546-549,共4页
Journal of Chemical Engineering of Chinese Universities
