Supercritical fluid extraction solubility data for monoolein, diolein and triolein in carbon dioxide were measured using a phase equilibrium re-circulation high-pressure type apparatus at 60° C and at various pressures. In order to examine the supercritical fluid extraction operation effects at high-pressures, detailed experimental determination were made on the compositions of the equilibrium vapor and liquid phases in the system (carbon dioxide/monoolein, carbon dioxide/diolein and carbon dioxide/triolein) at various conditions. It was found that weight fractions of up to 1% of monoolein could be obtained in the vapor phase. This might be sufficient to make supercritical fluid extraction using carbon dioxide solvent a possibility for this component. This renders a separation by simple distillation impossible. These systems were modeled based on the Redlich-Kowng equation of state. The experimental data was found to agree well with the data obtained by the model.