Phase equilibria for binary aqueous systems from a near-critical water reaction apparatus

For any valid study of reaction kinetics the phase equilibria involved must, be known. We present an apparatus designed to measure both phase equilibria and kinetics for reactions in near-critical water. Liquid-liquid mutual solubilities are reported for the benzene-water and toluene-water systems from 200 to 275 degrees C at the three-phase pressures and 172 bar. These data were found to be in good agreement with data reported in the literature. Additionally, the near-critical water reaction apparatus was used to verify one-phase regions for the phenol-water and p-cresol-water systems from 250 to 300 degrees C at 172 bar.