(Liquid + liquid) equilibrium data for the separation of 2,3-butanediol from aqueous streams using tetraoctyl ammonium 2-methyl-1-naphthoate

► Recovery of 2,3 butanediol from water using a task specific ionic liquid [TOA MNaph]. ► LLE data was correlated using the NRTL and UNIQUAC at three different temperatures. ► Both models describe the system adequately RSMD: 1.54% NRTL and 1.88% UNIQUAC.