Isobaric Vapor–Liquid Equilibria of Tertiary Amine and n-Alkane/Alkanol Binary Mixtures: Experimental Measurements and Modeling with GC-PPC-SAFT

Abstract

New isobaric vapor–liquid equilibria data were measured for N,N-dimethyl-1-butanamine + n-hexane, n-heptane, 1-propanol, 1-butanol, or 1-pentanol and N,N-dimethyl-1-octanamine + n-heptane or 1-butanol binary mixtures. The boiling temperatures of both pure amines were also investigated. For this, an ebulliometer based on Cottrell’s apparatus was used. Thus, 180 new mixture data points displayed on 35 isobars were obtained in a pressure range from (29.84 to 99.83) kPa and in the full composition range. The experiments were compared with the Group contribution polar perturbed chain statistical associating fluid theory (GC-PPC-SAFT) equation of state predictions for pure amines and the mixtures containing an alkane. In the case of the systems containing an alkanol, the binary interaction parameters needed to be fitted.