2,4/2,6-二氨基甲苯固液相平衡测定及关联  

Measurement and Correlation of Solid-Liquid Equilibrium of a 2,4 / 2,6-Toluenediamine Binary System

作　　者：王彦飞[1] 赵艳平[1] 杨静[1] 杨立斌[1] 朱亮[1] 赵晓昱[1] 沙作良[1] 

机构地区：[1]天津科技大学化工与材料学院天津市海洋资源与化学重点实验室,天津300457

出　　处：《高校化学工程学报》2016年第3期520-526,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：教育部科研创新团队培育计划([2013]373);天津市高等学校创新团队培养计划(TD12-5004)

摘　　要：采用差示扫描量热法测定了2,4-二氨基甲苯、2,6-二氨基甲苯的二元固液相平衡数据,绘制出相应的简单低共熔型二元相图。物系低共熔摩尔分数组成和温度为:2,4-二氨基甲苯(x_1)+2,6-二氨基甲苯(1-x_1),x_1=0.4999,T=336.56 K。分别采用理想溶液模型、Wilson方程、λh方程和Ott经验方程对固液平衡数据进行关联,温度平均标准偏差1.89、0.15、0.21和0.05 K。关联结果表明Wilson方程、λh方程和Ott经验方程对固液平衡数据关联精度较高,均能很好的关联该二元固液相平衡数据,但基于Wilson方程的参数只有两个,所以优先选择Wilson方程进行数据关联。固液平衡的测定和关联为该体系工业生产、回收提纯及理论研究提供重要的固液相平衡数据。Solid-liquid equilibrium data of 2,4-toluenediamine＋2,6-toluenediamine mixtures were determined by differential scanning calorimetry with corresponding eutectic phase diagram presented.The eutectic composition of the 2,4-toluenediamine（x1）＋2,6-toluenediamine（1-x1） mixture is at x1 = 0.4999, T = 336.56 K. The solid-liquid equilibrium data were fitted by ideal solution model, Wilson equation, λh equation and Ott＇s equation with temperature standard deviations less than 1.89, 0.15, 0.21 and 0.05 K, respectively. The results show that Wilson equation, λh equation and Ott＇s equation can provide good correlation, and Wilson equation is preferred as it only contains two parameters. The SLE data and their correlations obtained in this study provide useful data for industrial recovering and purification.

关 键 词：固液平衡 相图 2 4-二氨基甲苯 2 6-二氨基甲苯 差示扫描量热法 关联 

分 类 号：O625.65[理学—有机化学]