LIQUID-LIQUID EQUILIBRIA FOR 2,3-BUTANEDIOL PLUS WATER PLUS ORGANIC-SOLVENTS AT 303.15-K

Liquid-liquid equilibria at 303.15 +/- 0.5 K were measured for water 2,3-butanediol + butan-1-ol, + 3-methyl-1-butanol, + 4-methyl-2-penta none, + tributyl phosphate, and + butyl acetate. Complete phase diagra ms were obtained by evaluating the solubility and tie-line results for each ternary mixture. The consistency of the tie-line results was asc ertained using an Othmer-Tobias plot. The distribution coefficient and separation factors were evaluated over the immiscibility region. Amon g the solvents studied, butan-1-ol is the most effective one though tr ibutyl phosphate and 3-methyl-1-butanol may be preferred because of th eir low solubility and high selectivity.