High pressure phase equilibrium measurements of long chain 1-alcohols (1-decanol through 1-docosanol) in supercritical ethane and their prediction are presented. The data were measured in a high pressure view cell above the melting points of these alcohols, i.e. between 308 and 356 K, and with 1-alcohol mass fractions ranging from 0.0173 to 0.648. The results show a linear relationship between the phase transition pressure and the system temperature. The phase transition pressure increases with increasing molecular mass of 1-alcohol at constant temperature and composition. Furthermore, a linear relationship exists between the phase transition pressure and the number of carbon atoms of the 1-alcohol, making it easy to predict phase transition by simple interpolation within the experimental boundaries. Additionally, the state-of-the-art sPC-SAFT EOS model, as now typically included in process simulators, is unable to predict the phase equilibria, although it tends to give better results than the classic Peng Robinson EOS. (C) 2010 Elsevier B.V. All rights reserved.