水-正丙醇-正丁醇三元体系汽液平衡实验数据与计算  

Experimental VLE Data and Calculation of Water/n-Propanol/n-Butanol Ternary System

作　　者：张建华[1] 魏顺安[1] 李诗纯[1] 董立春[1] 

机构地区：[1]重庆大学化学化工学院,重庆400044

出　　处：《高校化学工程学报》2010年第5期729-734,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：重庆市自然科学基金(CSTC;2008BB0059);教育部留学人员回国启动基金(教外司留(2009)8-1)

摘　　要：水-正丙醇-正丁醇三元体系常见于乙炔法生产1,4-丁二醇工艺产生的废液中,对该体系汽液平衡数据进行测定是对其进行分离回收的前提,而目前文献中,仅在极窄的温度范围内有很少的相关数据。今测定了99.2kPa时,在正丙醇与正丁醇的配料体积比分别为1/4、3/7、2/3、1/1和3/2,水含量直至气相出现液液分层条件下水-正丙醇-正丁醇溶液的三元汽液平衡数据,从而明显扩大了该体系的实验数据及温度适用范围;研究中还用扩展型UNIQUAC方程建立了溶液组分的活度系数模型,关联该体系的汽液平衡数据,通过单纯型法回归获得三元体系组分之间的相互作用能参数。计算结果表明,建立的模型应用相同的相互作用能参数,可以很好的关联本实验测定的数据及文献数据,一方面说明本实验数据与文献数据有很好的一致性,另一方面也表明建立的UNIQUAC模型可以可靠地预测水-正丙醇-正丁醇的汽液平衡数据。In the production of 1,4-butanediol from acetylene,the water /n-propanol /n-butanol ternary system is commonly existed in its liquid waste.In order to recover them by separating process,the vapor-liquid equilibrium（VLE） data of the system is important.However,only limited VLE data of the above ternary system in a very narrow temperature range can be found nowadays in the literatures.In this study,the VLE data of the water /n-propanol /n-butanol ternary system were measured at 99.2 kPa with the initial volume ratio between n-propanol and n-butanol is 1/4,3/7,2/3,1/1 and 3/2,respectively,and the temperature is up to the vapor stratification point.Moreover,the measured VLE data was correlated by using an activity coefficient model established from the extended UNIQUAC equation,in which the binary interaction energy parameters between the three components were obtained through a simplex fitting method.The results show that,using the same interaction energy parameters obtained,the established model can correlate both the experimental data and the literature data well.It demonstrates that the experimental data are very consistent with the literature data,and the extended UNIQUAC model is reliable for the prediction of the VLE data of the water /n-propanol /n-butanol ternary system.

关 键 词：水-正丙醇-正丁醇体系 汽液平衡 UNIQUAC模型 相互作用能参数 

分 类 号：O642.42[理学—物理化学] TQ223.12[理学—化学]