TY - JOUR ID - 82026 TI - Separation of Formic Acid from Aqueous Solutions by Liquid Extraction Technique at Different Temperatures JO - Physical Chemistry Research JA - PCR LA - en SN - 2322-5521 AU - Behroozi, Mahboobe AU - Vahedpour, Morteza AU - Shardi Manaheji, Mahtab AD - Department of Chemistry,Faculty of Science,University of Zanjan,Zanjan, Iran AD - Department of Chemistry,Faculty of Science, University of Zanjan, Zanjan, Iran Y1 - 2019 PY - 2019 VL - 7 IS - 1 SP - 201 EP - 215 KW - Liquid-liquid equilibrium KW - NRTL KW - UNIQUAC KW - Formic acid KW - 2-Methylpropyl ethanoate DO - 10.22036/pcr.2019.154646.1557 N2 - In this study, the separation of formic acid from aqueous solutions was investigated. Liquid-liquid equilibrium (LLE) data including tie-lines was reported for water + formic acid + 2-methylpropyl ethanoate ternary mixture at (293.15 to 323.15) K and atmospheric pressure. The system shows type-I phase behavior based on Treybal’s classification because only one partially miscible binary mixture (water + 2-methylpropyl ethanoate) was observed. The composition of tie-lines was determined by cloud point method and refractive index measurements. The results show that the solubility of formic acid in the water-rich phase is more than in the solvent-rich phase. The extracting capability of the solvent was ascertained by determining the distribution coefficients and separation factors. The reliability of tie-line data was checked by Othmer–Tobias and Hand equations. The experimental data were correlated with NRTL and UNIQUAC models and the binary interaction parameters were determined. The values of the root-mean-square deviation (RMSD) were confirmed the quality of the correlations. UR - https://www.physchemres.org/article_82026.html L1 - https://www.physchemres.org/article_82026_edccd71b496df6408fd987090cdf11bd.pdf ER -