VAPOR-LIQUID PHASE-EQUILIBRIUM AT HIGH-PRESSURES FOR THE ETHANE-TRINORMALBUTYLALUMINUM AND ETHANE-TRINORMALHEXYLALUMINUM SYSTEMS

A continous-flow apparatus was used to measure vapor-liquid phase equi librium data for the ethane-trinormalbutylaluminum (TnBA) and ethane-t rinormalhexylaluminum (TnHA) systems. The apparatus includes a view ce ll to observe phase behavior at equilibrium conditions. The ethane-hep tane system was studied at 394 K and pressures from 41.4 to 82.7 bar t o ensure the reliability of the apparatus for obtaining accurate vapor -liquid equilibrium data. On-line, homogeneous, vapor- and liquid-phas e samples were obtained for analysis by gas chromatography. The phase compositions determined by analytical and gravimetric methods are in g ood agreement with those reported previously in the literature. The et hane-TnBA and ethane-TnHA systems were each studied along the three is otherms of 348, 373 and 398 K. The pressures ranged from 82.7 to 148.2 bar for the ethane-TnBA system and 89.6 to 175.1 bar for the ethane-T nHA system. Equilibrium vapor- and liquid-phase compositions were obta ined along each isotherm at selected pressures by a gravimetric method . The phase equilibrium data were correlated and checked for internal consistency.