CRITICAL PARAMETERS AND SATURATION DENSITIES OF 1,1-DICHLORO-2,2,2-TRIFLUOROETHANE

An optical cell has been used to determine the critical parameters, Tc and ρ{variant}c, and densities along the liquid-vapor phase boundary of 1,1-dichloro-2,2,2-trifluoroethane (Refrigerant 123). The critical temperature was found to be 456.87 K and the critical density is 550 kg/m3. The critical pressure was calculated from vapor pressure data to be 36.74 bar, which yields a value of 0.269 for the critical compressibility factor, Zc. Measurement temperatures varied from 298 K to the critical point for the saturated liquid and from 433 K to the critical point for saturated vapor. © 1990.