Solubility and Viscosity of Hydrofluorocarbon /Alkylbenzene Oil Mixtures

Solubility data of refrigerant/lubricant mixtures have been modeled with a cubic equation of state. The systems studied are binary mixtures of hydrofluorocarbons (R-32, R-125, R-134a and R-143a) and alkylbenzene oils (viscosity grades 15 and 32). These partially miscible mixtures are well correlated with the present model, which can be used for calculating the pressure-temperature-composition relationship for a wide range of state variables, presumably including multi-component systems. Viscosity data for these mixtures have been correlated with an empirical equation and a simple mixing rule. Using the equation of state and the empirical viscosity equation, charts of pressure-viscosity-temperature-solubility relation (Daniel charts) have been constructed.