Measurement and correlation of ternary system {water + 2,3-butanediol + 2-methyl-1-pentanol} and {water + 2,3-butanediol + 3-methyl-1-butanol} liquid-liquid equilibrium data

• Published in: Fluid phase equilibria 2020-08, Vol.518, p.112639, Article 112639
• Main Authors: Kim, Hyun Ji, Yim, Joon-Hyuk, Lim, Jong Sung
• Format: Article
• Language: English
• Subjects: 2,3-Butanediol; 2-Methyl-1-pentanol; 3-Methyl-1-butanol; LLE; NRTL
• ISSN: 0378-3812; 1879-0224
• DOI: 10.1016/j.fluid.2020.112639

The liquid–liquid equilibriums (LLE) in two ternary systems, {water + 2,3-butanediol + 2-methyl-1-pentanol} and {water + 2,3-butanediol + 3-methyl-1-butanol}, were studied at three temperatures, 298.2 K, 308.2 K, and 318.2 K. To complete the phase diagram, the LLE data and solubility data were obtained. To select a suitable solvent, distribution coefficient (D) and selectivity (S) were calculated. The values of D and S of 2-methyl-1-pentanol were (0.36–0.67) and (3.29–7.97) and those of 3-methyl-1-butanol were (0.44–0.95) and (2.29–5.80), respectively. Compared to the values of previously reported solvents, the values of D and S of 3-methyl-1-butanol were relatively higher. Nonrandom two liquids (NRTL) model was used to correlate the experimental data. All root mean square deviation (RMSD) values were 0.0166 in average, which indicates successful correlations between the experimental data and those obtained from the NRTL model.