Liquid−Liquid Equilibria of Hydrocarbons with N-Formylmorpholine

Liquid−liquid equilibria of N -formylmorpholine (NFM) with alkanes ( n -hexane, n -heptane, isononane), aromatics (benzene, p -xylene, toluene), and water were investigated. The experiments were conducted by considering binary, ternary, and quaternary systems at different temperatures (20−60 °C) and initial mixture compositions in the range of mole fraction equal to 0.3−0.6 for NFM, 0.23−0.4 for alkanes, 0.11−0.4 for aromatics, and 0.072−0.24 for water, respectively. The results are used to estimate the interaction parameters of the UNIQUAC expression, for the pairs NFM/ n -hexane, NFM/ n -heptane, NFM/isononane, NFM/benzene, NFM/ p -xylene, NFM/toluene, and NFM/water whose values were not available in the literature.