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Liquid–Liquid Equilibrium Data for Cyclohexane–Ethanol–Solvent Ternary Systems and Their Correlation with the Nonrandom Two-Liquid Model
Journal of Chemical & Engineering Data ( IF 2.6 ) Pub Date : 2021-10-12 , DOI: 10.1021/acs.jced.1c00522
Chong Yang 1, 2 , Huakang Wu 1, 2 , Yepeng Xiao 1, 2 , Yiqiang Deng 1, 2 , Lihua Cheng 1, 2 , Xinping Ouyang 1, 2, 3
Affiliation  

Liquid–liquid equilibrium data for a cyclohexane–ethanol–solvent ternary system were obtained at 303.15 K and 100.3 kPa using 1,4-butanediol, dimethyl sulfoxide, or N,N-dimethylformamide as the extractant. Extraction abilities of these solvents in the separation of ethanol from a mixture containing cyclohexane were determined in terms of the distribution coefficient and the separation factor derived from experimental values. The extraction ability of 1,4-butanediol was higher than those of the other two extractants for the separation of ethanol from cyclohexane. Moreover, the experimental data were fitted with the nonrandom two-liquid model, and the binary energy parameters were calculated accordingly. The divergence between the measured tie-line data and the calculated results was determined based on the root-mean-square deviation (RMSD). The highest value of RMSD was 0.98%, suggesting that the model is suitable for correlating the experimental values for the cyclohexane–ethanol–solvent ternary systems.

中文翻译:

环己烷-乙醇-溶剂三元体系的液-液平衡数据及其与非随机两液模型的相关性

环己烷-乙醇-溶剂三元体系的液-液平衡数据是在 303.15 K 和 100.3 kPa 下使用 1,4-丁二醇、二甲亚砜或NN 获得的-二甲基甲酰胺作为萃取剂。这些溶剂在从含有环己烷的混合物中分离乙醇中的萃取能力是根据分配系数和由实验值得出的分离因子确定的。1,4-丁二醇的萃取能力高于其他两种萃取剂,用于从环己烷中分离乙醇。此外,将实验数据与非随机二液模型进行拟合,并据此计算二元能量参数。测量的联络线数据与计算结果之间的差异是根据均方根偏差 (RMSD) 确定的。RMSD 的最高值为 0.98%,表明该模型适用于关联环己烷-乙醇-溶剂三元系统的实验值。
更新日期:2021-12-09
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