高校化学工程学报Issue(2)：330-333,4.DOI:10.3969/j.issn.1003-9015.2013.02.025
苯,环己烷,N,N-二甲基甲酰胺和硫氰酸钾四元体系液液平衡测定及关联
Liquid-Liquid Equilibria Determination and Correlation for Systen of Benzene+Cyclohexane+N,N-dimethylformamide+Potassium Thiocyanate
摘要
Abstract
Experimental liquid-liquid equilibrium (LLE) data were measured for system of benzene +cyclohexane + N,N-dimethylformamide (DMF) + potassium thiocyanate (KSCN) at normal atmospheric pressure and (298.15, 303.15) K by using gas chromatography which the n-butyl alcohol was used as internal standard. The selectivity coefficients of DMF+KSCN for benzene ranged from 1.5 to 10.3 in this work. The results reveal that the selectivity coefficients increase with the decreasing of the concentration of benzene in the raffinate, and increase with the increasing content of KSCN in DMF+KSCN mixture. The experimental data were correlated by using the Othmer-Tobias correlation. The Othmer-Tobias model represents the experimental data with sufficient accuracy with the values of correlation factor R2 close to 1.0 and the values of the root mean square error range from 0.05 to 0.09. Considering the high selectivity for benzene, DMF+KSCN may be used as a potential extraction solvent for the separation of benzene and cyclohexane mixtures.关键词
苯/环己烷/选择性/Othmer-Tobias关联Key words
benzene/cyclohexane/selectivity/Othmer-Tobias correlation分类
化学化工引用本文复制引用
张进,岳国君,董红星,杨晓光..苯,环己烷,N,N-二甲基甲酰胺和硫氰酸钾四元体系液液平衡测定及关联[J].高校化学工程学报,2013,(2):330-333,4.基金项目
国家自然科学基金(20976032 （）
21076049) （）
黑龙江省自然科学基金(E200808) （E200808）
中央高校基本科研业务费专项基金资助(HEUCFT1009,HEUCFR1227) （HEUCFT1009,HEUCFR1227）
