离子液体萃取精馏分离甲醇-乙腈共沸体系  

Separation of Methanol-Acetonitrile Azeotrope System by Ionic Liquid Extractive Distillation

作　　者：李丽 肖孟杰 李文秀 马帅 张弢 LI Li;XIAO Mengjie;LI Wenxiu;MA Shuai;ZHANG Tao(Shenyang University of Chemical Technology,Shenyang Liaoning 110142,China)

机构地区：[1]沈阳化工大学辽宁省化工分离技术重点实验室,辽宁沈阳110142

出　　处：《辽宁化工》2024年第5期654-656,690,共4页Liaoning Chemical Industry

基　　金：国家自然科学基金资助项目(项目编号:21576166)。

摘　　要：使用离子液体1-己基-3-甲基咪唑六氟磷酸盐([HMIM][PF_(6)])作为分离甲醇和乙腈共沸物系的夹带剂,在101.3 kPa下获得了三元气液相平衡(VLE)数据,用非随机双液(NRTL)模型关联实验数据,得到基于NRTL模型的二元交互作用参数,同时计算出离子液体打破共沸需要的最小摩尔分数为0.0367。最后,用过量焓分析解释分离机理。The ionic liquid 1-hexyl-3-methylimidazolium hexafluorophosphate([HMIM][PF_(6)])was used as the entrainer for separating the azeotrope system of methanol and acetonitrile.The ternary vapor-liquid equilibrium(VLE)data were obtained at 101.3 kPa.The experimental data were correlated with the non-random dual-liquid(NRTL)model to obtain the binary interaction parameters.At the same time,the minimum mole fraction required to break the azeotrope was calculated to be 0.0367.The separation mechanism was explained by excess enthalpy analysis.

关 键 词：甲醇 乙腈 离子液体 NRTL 过量焓分析 

分 类 号：TQ028[化学工程]