N—甲基甲酰胺+吡咯+烷烃三元体系相平衡测量和相关性研究

Phase Equilibrium Measurement and Correlation Study of N-methylformamide+Pyrrole+Alkane Ternary System

为了从柴油中分离出氮化合物,选择N-甲基甲酰胺作为萃取过程的萃取剂。在常温(298.15K)常压下测量{NMF+吡咯+烷烃}的三元体系的液-液平衡数据。四个三元系统的三角图都被归于Trey Bal的I型系统,属于一个部分可混溶的系统。同时,使用NRTL和UNIQUAC活度系数模型对实验数据进行相关,UNIQUAC模型较NRTL显示出更好的相关性。此外,基于实验数据计算分配系数和选择性,以研究NMF对吡咯和吲哚的萃取能力。

In order to separate nitrogen compounds from diesel oil,N-methylformamide was selected as the extractant for the extraction process.The liquid-liquid equilibrium data of the ternary system of{NMF+pyrrole+alkane}was measured at normal temperature(298.15 K)at normal pressure.The triangles of the four ternary systems are attributed to Trey Bal’s Type I system and are part of a partially miscible system.At the same time,the experimental data were correlated using the NRTL and UNIQUAC activity coefficient models,and the UNIQUAC model showed a better correlation than the NRTL.In addition,the partition coefficients and selectivity were calculated based on experimental data to investigate the extraction ability of NMF for pyrrole and hydrazine.