ABSTRACT
The precise vapor-liquid equilibrium (VLE) data of binary mixtures like alcohol-alcohol are important to design many chemical processes and separation operations. The
VLE investigations of binary systems have been the subject of much interest in recent years (Artigas et al., 1997, 2001; Rodriguez et al., 2002; Seo et al., 2000). In the past, several authors have reported isobaric VLE data for the system of tert-butanol (TBA) + water (Hirata et al., 1975; Kojima and Tochigi, 1979; Quitzsch et al., 1968; Suska et al., 1970). Darwish and Al-Anber (1997) have presented isobaric VLE data for the binary systems of TBA + water and of TBA + isobutanol at 94.9 kPa. We have recently reported (Ghanadzadeh and Ghanadzadeh, 2002a) the LLE data for ternary mixture of water + TBA + 2-ethyl-1-hexanol, where only one liquid pair of partially miscible (2-ethyl-1-hexanol + water) and two liquid pairs of completely miscible (water + TBA) and (2-ethyl-1-hexanol + TBA). From the experimental results, 2-ethyl-1-hexanol was chosen as the best solvent for recovering TBA and n-butanol (NBA) from aqueous solution (Ghannadzadeh, 1993a; Ghanadzadeh and Ghanadzadeh, 2002a, 2003a).
