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8359963 
Journal Article 
Liquid-liquid equilibrium data for the ternary systems of propionic acid-water-solvents 
Roy, BC; Awual, MR; Goto, M 
2006 
Yes 
Journal of Applied Sciences
ISSN: 1812-5654 
6 
2 
411-415 
English 
Liquid-liquid equilibrium data for propionic acid with water and solvents (methyl butyl ketone, methyl isopropyl ketone and methyl isobutyl ketone) are presented at 25-26°C and used to evaluate the possibility of employing distribution of propionic acid between water and these solvents as a means of separation of propionic acid from its aqueous solution. Mutual solubility curves, tie-line data, distribution coefficient, selectivity diagrams and separation factor data were determined for these systems. The thermodynamic consistency of the tie-line data was ascertained by Othmer-Tobias plots as well as by Hand plots. From these data it has been concluded that all these solvents are suitable separating agents for propionic acid from its dilute aqueous solution, but of these solvents methyl isobutyl ketone offers the best hope of achieving separation of propionic acid by distribution between methyl isobutyl ketone and water as it has the highest separation factor value than those of other two solvents. © 2006 Asian Network for Scientific Information. 
Distribution coefficient; Liquid-liquid equilibrium; Separation factor; Ternary system; Tie-line