High-pressure phase equilibria data of systems containing limonene, linalool and supercritical carbon dioxide

Publisher Summary A high-pressure circulation-type apparatus is designed and constructed in this chapter to investigate the vapor–liquid equilibria (VLE) of systems containing limonene, linalool, and supercritical carbondioxide (scCO2). The main piece of the equipment is a high-pressure phase equilibrium cell of approximately 100 cm3. The apparatus includes a compressed-air actuated piston-pump that allows circulating one or both phases to bring the vapor and liquid in close contact with each other. This pump, the cell, and all the related valves are placed in a constant-temperature water bath to have and to keep uniformly the desired temperature. VLE data of binary and ternary systems of limonene, linalool, and scCO2 can be determined in the ranges of pressure and temperature of interest for the deterpenation of coldpressed orange oil. The preliminary results obtained for the binaries CO2–linalool and CO2–limonene are compared in the chapter to data already published with acceptable accuracy and well correlated by a modified Soave–Redlich–Kwong (SRK) equation of state.