Solid-liquid equilibria and excess enthalpies in binary mixtures of acetophenone with some aliphatic amides

Solid-liquid equilibria for the binary systems of acetophenone and {N-methylformamide, or N,N-dimethylformamide, or N,N-dimethylacetamide, or N-methyl-2-pyrrolidone} were determined by the cloud-point and DSC techniques. For the same systems, excess enthalpies were measured at 293.15 K and 308.15 K by the titration calorimetry. Both types of data were correlated by the Redlich-Kister equation. The description of the solid-liquid equilibria incorporated measured excess enthalpies. The results of the prediction performed by the modified UNIFAC model were compared with the experimental data. The observed trends and differences between systems were discussed. •SLE and HE in the acetophenone + an amide binary systems were measured.•Negative deviations from ideality for systems with aprotic amides were observed.•The system with N-methylformamide differs considerably from others.•Applicability of the modified UNIFAC to predict these properties was checked.