【摘要】 含水ＤＭＦ溶剂对苯和噻吩相对挥发度的影响刘兵，郑英峨，赵维彭（南京化工大学，化学工程系）关键词苯；噻吩；相对挥发度；汽液平衡（ＶＬＥ）；萃取精馏１前言我国焦化苯所占比重较大［１］，焦化苯中硫化物（主要以噻吩形式存在）等杂质的含量普遍较高，限制了高质量...更多还原

【Abstract】 Vapor-Liquid equilibrium data for the binary systems of Benzene-Dimethylformide(DMF), Benzene-Thiophene and Thiophene-DMF as well as the ternary system of Benzene-Thiophene-DMF and the quarternary system of Benzene-Thiophene-Water-DMF were determinded at 101. 3 kPa by a modified Rose-Williams equilibrium still.The VLE data were correlated by three thermodynamic models, which can be applied to the engineering design.The relative volatilities of Benzene and Thiophene were compared based on the VLE data of binary, ternary and quarternary systems with DMF of aqueous DMF as a solvent.The results show that the relative volatility of benzene and thiophene in the presence of aqueous DMF as a solvent is obviously the highest, Therefore, separating the trace of thiophene from benzene by extractive distil lation with aqueous DMF as a solvent has a better effect.更多还原