Determination of Liquid−Liquid equilibria of ethylene glycol + 1, 2-Butanediol + 5-Methyl-2-hexanone/Di-isobutyl ketone ternary systems. (May 2022)

• Record Type: Journal Article
• Authors: Chen, Guangyuan; Shi, Yunhai; Shen, Rongchun; Li, Wei; Zhou, Jinghong
• Is Part Of: Journal of chemical thermodynamics. Volume 168(2022)
• Publication Date: 2022-05
• Subjects: Liquid-liquid equilibrium -- Ethylene glycol -- 1, 2-Butanediol -- NRTL -- UNIQUAC; Thermodynamics -- Periodicals; Thermochemistry -- Periodicals; Thermodynamique -- Périodiques; Thermochimie -- Périodiques; Thermochemistry; Thermodynamics; Periodicals; 541.369
• DOI: 10.1016/j.jct.2022.106739
• Languages: English
• ISSNs: 0021-9614

Abstract

Abstract: Two kinds of ketones, 5-methyl-2-hexanone and di-isobutyl ketone were selected as the extraction agents for separating the azeotrope of ethylene glycol (EG)and 1, 2-butanediol (1, 2-BDO). By comparing the results of preliminary extraction experiments under 303.15 K and normal pressure, 5-methyl-2-hexanone was the better one. And the Liquid-liquid equilibrium data of EG + 1, 2-BDO + 5-methyl-2-hexanone ternary system were successively measured at 293.15 K and 313.15 K. The distribution coefficient ( K 2 ) and selectivity coefficient ( S ) of 1, 2-BDO were calculated from the experimental data. The LLE data were correlated by NRTL and UNIQUAC activity models with the authorized Aspen Plus software. The root mean square deviations ( RD ) between the experimental and calculated values were all less than 0.7%, which means they were consistent with each other very well.