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7856029 
Journal Article 
Aqueous phase diagrams containing t-aconitic acid plus (1-pentanol or plus isobutyl acetate or plus methyl isobutyl ketone) at 303.15 K 
Barnes, N; de Doz, MG; Solimo, HN 
2000 
Yes 
Fluid Phase Equilibria
ISSN: 0378-3812 
ELSEVIER SCIENCE BV 
AMSTERDAM 
168 
2 
217-227 
English 
WOS:000086179000006 
Phase diagrams of ternary systems, water + t-aconitic acid (AA) + (1-pentanol (P) or + isobutyl acetate (iBuAc) or + methyl isobutyl ketone (MIK), were obtained at 303.15 ± 0.05 K. Experimental results show that all aqueous AA systems have one liquid-liquid equilibria region and three solid-liquid equilibria zones, where the solid is the AA. The recovery of this acid from aqueous solutions was evaluated by analyzing its distribution coefficients, selectivities, and distribution curves on a solvent-free basis. Although the experimental distribution coefficients are practically always less than unity for the three systems, the selectivities are higher due to the lower solubility of the non-consolutes, particularly for MIK, which appears as the best solvent among those studied here. The experimental data were also compared with values calculated by the NRTL and UNIQUAC equations for these ternary mixtures. (C) 2000 Elsevier Science B.V. All rights reserved. Phase diagrams of ternary systems, water+t-aconitic acid (AA)+(1-pentanol (P) or +isobutyl acetate (iBuAc) or +methyl isobutyl ketone (MIK)), were obtained at 303.15±0.05 K. Experimental results show that all aqueous AA systems have one liquid-liquid equilibria region and three solid-liquid equilibria zones, where the solid is the AA. The recovery of this acid from aqueous solutions was evaluated by analyzing its distribution coefficients, selectivities, and distribution curves on a solvent-free basis. Although the experimental distribution coefficients are practically always less than unity for the three systems, the selectivities are higher due to the lower solubility of the non-consolutes, particularly for MIK, which appears as the best solvent among those studied here. The experimental data were also compared with values calculated by the NRTL and UNIQUAC equations for these ternary mixtures. 
chemical equilibria; data; solid-liquid equilibria; liquid-liquid equilibria; ternary aqueous t-aconitic acid systems