Measurement and Correlation of Liquid-liquid Equilibria for 1-Hexene-n-Hexane-3-Methysulfolane  

作　　者：Ma Rui Tian Longsheng Zhao Ming Yang Mingke Qie Siyuan 

机构地区：[1]SINOPEC Research Institute of Petroleum Processing Co.,Ltd.,Beijing 100083,China

出　　处：《China Petroleum Processing & Petrochemical Technology》2024年第2期81-87,共7页中国炼油与石油化工（英文版）

基　　金：The authors wish to acknowledge financial support by the project of SINOPEC(No.223039).

摘　　要：Utilizing solvent extraction to separate alkanes and olefins from catalytic light gasoline is an effective method for maximizing the utility of gasoline fractions.This study presents the determination of liquid-liquid equilibrium data for the ternary system of 1-hexene-n-hexane-3-methylsulfolane at 30℃,40℃,and 50℃under atmospheric pressure.The obtained data facilitated the construction of a ternary phase diagram for the system.The results showed that the extraction selectivity of 1-hexene/n-hexane exceeded 1.5 when using 3-methylsulfolane as the extraction solvent.Furthermore,the thermodynamic consistency of the experimental data was examined using Hand’s equation and the Othmer-Tobias method.The correlation coefficient,R^(2)≥0.9578,indicated the acceptable reliability of the phase equilibrium data.Subsequently,the NRTL(non-random two liquid)model was used to correlate the liquid-liquid phase equilibrium data and derive the binary interaction parameter.Notably,the results demonstrated that the root mean square deviation of the NRTL model correlation values from the experimental values did not exceed 2.5%.

关 键 词：liquid-liquid phase equilibrium 1-HEXENE N-HEXANE 3-methylsulfolane NRTL 

分 类 号：TE624[石油与天然气工程—油气加工工程]