On the Solubility of Glycerides and Fatty Acids in Compressed Gases in the Presence of an Entrainer

Abstract

Abstract The solubility of fatty acids and their glycerides in dense supercritical gases increases with increasing pressure at constant temperature. The temperature influences the solution equilibria in a more complicated way than the pressure. Addition of an entrainer increases the solubility in the gas phase. Furthermore, the temperature dependence of the solvent power is increased so much that the regeneration of the circulating gas in a separation process becomes possible by a change of temperature only. By a suitable entrainer the separation factor can also be improved.