Phase equilibrium data for binary mixtures of carbon dioxide with {1,1,2,3,3,3-hexafluoro-1-propene or 2,2,3-trifluoro-3-(trifluoromethyl)oxirane} at temperatures between (233 and 273) K

Isothermal vapour-liquid equilibrium data were measured for binary mixtures of carbon dioxide with either hexafluoropropylene or hexafluoropropylene oxide at five temperatures in the (233–273) K range. The experimental data presented in this manuscript supplement data which were previously measured at temperatures of 273 K and above. The data is required for the assessment of the operating conditions for a purification process for the production of high purity hexafluoropropylene oxide from a mixture of hexafluoropropylene and hexafluoropropylene oxide. The experimental P-x-y data were measured using an apparatus based on the “static-analytic” method. The experimental data were satisfactorily correlated using the Peng-Robinson Equation of State with the Mathias-Copeman alpha function.

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