二乙氧基甲烷+水+甲苯或对二甲苯三元体系的液液相平衡  

Liquid-liquid equilibria for ternary systems of diethoxymethane-water-toluene or p-xylene

作　　者：王利平 徐晓胜 李青松[1] 黄小侨 李雨师 段永生 李剑新 WANG Li-ping;XU Xiao-sheng;LI Qing-song;HUANG Xiao-qiao;LI Yu-shi;DUAN Yong-sheng;LI Jian-xin(State Key Laboratory of Heavy Oil Processing,China University of Petroleum (East China),Qingdao 266580,Shandong Province,China;PetroChina Fuel Oil Company limited Research Institute,Beijing 100195,China)

机构地区：[1]中国石油大学(华东)重质油国家重点实验室,山东青岛266580 [2]中石油燃料油有限责任公司研究院,北京100195

出　　处：《化学工程》2019年第5期34-38,共5页Chemical Engineering(China)

摘　　要：文章探讨了在常压下298.2和308.2K时三元体系水+二乙氧基甲烷+甲苯和水+二乙氧基甲烷+对二甲苯的液液相平衡数据。根据实验数据对分配系数和分离因子进行了估算,其值均高于1,表明甲苯和对二甲苯作为萃取剂具有较好的萃取能力和较高的选择性;使用Othmer-Tobias和Hand经验方程来检验实验数据的准确性和可靠性,其线性相关的平方均大于0.9900,表明数据具有较高的一致性;利用NRTL和UNIQUAC热力学模型对测量数据进行关联,相对均方根偏差(RMSD)均低于0.0097,表明NRTL和UNIQUAC都能很好地关联三元体系的实验数据。The liquid-liquid equilibrium(LLE)data about ternary systems of water-diethoxymethane-toluene and water-diethoxymethane-p-xylene were discussed at 298.2 K and 308.2 K under the atmospheric pressure.The partition coefficient and separation factor were estimated according to the experimental data,and their values were all greater than 1,indicating that toluene and p-xylene had better extraction ability and higher selectivity as extractant.Othmer-Tobias and Hand equations were utilized to validate the accuracy and reliability of the measured data.The linear correlation R 2>0.990 0,indicating that the data had a high consistency.Experimental LLE data were correlated with NRTL and UNIQUAC thermodynamic models,and all of RMSD values were below 0.009 7.The results show that the experimental data of each ternary system can agree well with NRTL and UNIQUAC models.

关 键 词：液液相平衡 二乙氧基甲烷 甲苯 对二甲苯 NRTL UNIQUAC 

分 类 号：TQ028.3[化学工程]