2,3-2,5-2,6-二甲基苯酚常压固液相平衡的测定及关联  

Measurement and correlation of 2,3-2,5-2,6-dimethylphenol solid-liquid phase equilibrium at atmospheric pressure

作　　者：马芳丽 许史杰 王飞 步雅卿 王彦飞 朱亮 MA Fang-li;XU Shi-jie;WANG Fei;BU Ya-qing;WANG Yan-fei;ZHU Liang(Tianjin Key Laboratory of Brine Chemical Engineering and Ecological Utilization of Resources,College of Chemical Engineering and Materials Science,Tianjin University of Science and Technology,Tianjin 300457,China)

机构地区：[1]天津科技大学化工与材料学院天津市卤水化工与资源生态化利用重点实验室,天津300457

出　　处：《化学工程》2021年第5期48-52,68,共6页Chemical Engineering(China)

摘　　要：为了探索采用熔融结晶分离二甲基苯酚系列同分异构体的可行性,并为后续的熔融结晶机理、动力学研究及工艺开发提供数据支撑,采用差示扫描量热法测定了2,3-2,5-2,6-二甲基苯酚(DMP)3个二元体系的固液相平衡数据,结果表明:2,3-2,5-DMP,2,3-2,6-DMP,2,5-2,6-DMP 3个二元体系的相图均属于带有最低共熔点的简单二元体系相图。采用理想溶液模型、Wilson与NRTL活度系数模型对相平衡数据进行拟合,结果表明2种活度系数模型均可较好地关联二元体系的固液相平衡。The purpose is to explore the feasibility of melt crystallization separation of dimethylphenol isomers.It provides data support,kinetic research and process development for the subsequent melt crystallization mechanism.The differential scanning calorimeter was used to determine the solid-liquid equilibrium data of 2,3/2,5/2,6-dimethylphenol(DMP)of three binary systems.The results show that the phase diagrams of 2,3-2,5-DMP,2,3-2,6-DMP and 2,5-2,6-DMP binary systems all have the lowest eutectic point.The ideal solution model,Wilson and NRTL activity coefficient models were used to fit the phase equilibrium data.As a result,both activity coefficient models can better correlate the solid-liquid equilibrium of the binary system.

关 键 词：差示扫描量热法 固液相平衡 二甲基苯酚 热力学模型 

分 类 号：O642.42[理学—物理化学]