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

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-hexa...

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Veröffentlicht in:The Journal of chemical thermodynamics 2022-05, Vol.168, p.106739, Article 106739
Hauptverfasser: Chen, Guangyuan, Shi, Yunhai, Shen, Rongchun, Li, Wei, Zhou, Jinghong
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Sprache:eng
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Zusammenfassung: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 (K2) 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.
ISSN:0021-9614
1096-3626
DOI:10.1016/j.jct.2022.106739