High-pressure vapor-liquid equilibrium data for binary and ternary systemsformed by supercritical CO2, limonene and linalool

The feasibility of deterpenating orange peel oil with supercritical CO2 dep ends on relevant vapor-liquid equilibrium data because the selectivity of t his solvent for limonene and linalool (the two key components of the oil) i s of crucial importance. The vapor-liquid equilibrium data of the CO2-limon ene binary system was measured at 50, 60 and 70 degrees C and pressures up to 10 MPa, and of the CO2-linalool binary system at 50 degrees C and pressu res up to 85 bar. These results were compared with published data when avai lable in the literature. The unpublished ternary phase equilibrium of CO2-l imonene-linalool was studied at 50 degrees C and up to 9 MPa. Selectivities obtained using these ternary data were compared with those calculated usin g binary data and indicate that a selective separation of limonene and lina lool can be achieved.