Phase equilibrium data for {camphor (1) + CO2 (2)}, {camphor (1) + propane (3)}, and {camphor (1) + CO2 (2) + propane (3)} were measured using a high-pressure variable-volume view cell and the synthetic static method; experiments were performed at temperatures of (304, 314, 324, 334, 344, 354, 364, 374, and 384) K. The phase transitions have been visually identified as bubble and dew points. The temperature and pressure uncertainties were 0.5 K and 0.07 MPa. The experimental data were described satisfactorily by the Peng-Robinson equation of state with vdW2 mixing rule. The binary interaction parameters (k12 and I12) were estimated by heuristic, optimization using the simulated annealing (SA) method. Propane considerably affected the phase behavior of camphor + CO2 when used as a second solvent, resulting in pressures for the LV phase transition intermediate to the phase transition pressure of the binary systems investigated. © 2006 American Chemical Society.5139971000Iwai, Y., Morotomi, T., Sakamoto, K., Koga, Y., Arai, Y., High-pressure vapor-liquid equilibria for carbon dioxide + limonene (1996) J. Chem. Eng. Data, 41, pp. 951-952Rodrigues, V.M., Sousa, E.M.B.D., Monteiro, A.R., Chiavone-Filho, O., Marques, M.O.M., Meireles, M.A.A., Determination of the solubility of extracts from vegetable material in pressurized CO2: A pseudo-ternary system mixture formed by cellulosic structure + solute + solvent (2002) J. Supercrit. Fluids, 22, pp. 21-36Arai, Y., Sato, T., Tekebayashi, Y., (2002) Supercritical Fluids: Molecular Interactions, Physical Properties, and New Applications, , Springer: BerlinWagner, Z., Pavlícek, J., Vapour-liquid equilibrium in the carbon dioxide-p-cymene system at high pressure (1993) Fluid Phase Equilib., 90, pp. 135-141Weber, W., Petkov, S., Brunner, G., Vapour-liquid-equilibria and calculations using the Redlich-Kwong-Aspen- equation of state for tristearin, tripalmitin, and triolein in CO2 and propane (1999) Fluid Phase Equilib., 158, pp. 695-706Lee, K.R., Tan, C.S., Vapor-liquid equilibria for the systems propane + m-cresol. propane + p-cresol. and propane + m-cresol + p-cresol at high pressures (1998) Fluid Phase Equilib., 143, pp. 125-141Corazza, M.L., Cardozo Filho, L., Antunes, O.A.C., Dariva, C., High-pressure phase equilibria of the related substances in the limonene oxidation in supercritical CO2 (2003) J. Chem. Eng. Data, 48, pp. 354-358Corazza, M.L., Cardozo Filho, L., Antunes, O.A.C., Dariva, C., Phase behavior of the reaction medium of limonene oxidation in supercritical carbon dioxide (2003) Ind. Eng. Chem. Res., 42, pp. 3150-3155Moura, L.S., Corazza, M.L., Cardozo Filho, L., Meireles, M.A.A., Phase equilibrium measurements for the system fennel (Foeniculum vulgare) extract + CO2 (2005) J. Chem. Eng. Data, 50, pp. 1657-1661Souza, A.T., Corazza, M.L., Cardozo-Filho, L., Guirardello, R., Meireles, M.A.A., Phase equilibrium measurements for the system clove (Eugenia caryophyllus) oil + CO2 (2004) J. Chem. Eng. Data, 49, pp. 352-356Stuart, G.R., Dariva, C., Oliveira, J.V., High-pressure vapor-liquid equilibrium data for CO2-orange peel oil (2000) Braz. J. Chem. Eng., 17, pp. 181-189Adams, R.P., (2001) Identification of Essential Oil Components by Gas Chromatography/ Quadrupole Mass Spectroscopy, , Allured Publishing Corporation: Carol Stream, ILAkgün, M., Akgün, N., Dinçer, S., Phase behaviour of essential oil components in supercritical dioxide of carbon (1999) J. Supercrit. Fluids, 15, pp. 117-125Adas, N., Dinçer, S., Bolat, E., Supercritical fluid extraction of essential oil from turkish lavender flowers (1994) J. Supercrit. Fluids, 7, pp. 93-99Henderson, N., Oliveira Jr., J.R., Amaral, H.P., Pitanga Marques, R., Modeling and analysis of the isothermal flash problem and its calculations with the simulated annealing algorithm (2001) Ind. Eng. Chem. Res., 40, pp. 6028-6038Kundu, M., Mandal, B.P., Bandyopadhyay, S.S., Vapor-liquid equilibrium of CO2 in aqueous solutions of 2-amino-2-methyl-1-propanol (2003) J. Chem. Eng. Data, 48, pp. 789-796Peng, D.Y., Robinson, D.B., A new two-constant equation of state (1976) Ind. Eng. Chem. Fundam., 15, pp. 59-64Press, W.H., Teukolsky, S.A., Vetterling, W.T., Flannery, B.P., (1997) Numerical Recipes in Fortran, 90. , Press Syndicate of the University of Cambridge: New YorkReid, R.C., Prausnitz, J.M., Sherwood, T.K., (1977) The Properties of Gases and Liquids, , McGraw-Hill: New YorkCorazza, M., Cardozo Filho, L., Dariva, C., SVL equilibrium for CO2/ cosolvent/solute system: Experimental data and modeling (2004) V EBFS-V Brazilian Meeting on Supercritical Fluids, , Florianópolis, Brazil, April 21-23