萃取精馏分离四氢呋喃-乙醇共沸物系  

Separation of tetrahydrofuran-ethanol binary azeotrope by extractive distillation

作　　者：刘伟明[1] 程庆来[1] 刘丽波[1] 白鹏[1] 

机构地区：[1]教育部系统生物工程重点实验室,天津大学化工学院,天津300072

出　　处：《天津化工》2009年第3期18-21,共4页Tianjin Chemical Industry

摘　　要：首先根据汽液平衡实验数据采用UNIFAC法进行VLE关联。然后通过定性判断、基团贡献法定量估算选择该二元物系的合适萃取剂为乙二醇。通过气液平衡实验对萃取剂的有效性进行验证,比较了不同溶剂比对四氢呋喃/乙醇相对挥发度的影响,当溶剂比为3时,相对挥发度为2.26。最后进行精馏实验验证过程的可行性。Firstly,the vapor-liquid equilibrium is correlated using UNIFAC method based on experimental data. Then the appropriate extractive solvent ethylene-glycol is chosen through qualitative estimation and quantitative calculation using group contribution method.The effectiveness of the solvent is validated through VLE experiment. The effect of different solvent ratio on relative volatility is investigated.When the solvent ratio is 3,the relative volatility reaches 2.26.At last the experiment of separation of tetrahydrofuran-ethanol by extractive distillation is carried out and the feasibihty of process is verified by the result.

关 键 词：共沸物 间歇萃取精馏 相对挥发度 UNIFAC法 

分 类 号：TQ028.13[化学工程]