High-Pressure Vapor-Liquid Equilibrium Data for Ternary Systems CO2+ Organic Solvent + Curcumin

摘要

In the present work phase equilibrium data for the ternary systems CO2 + ethanol + curcumin and CO2 + ethylacetate + curcumin, at different concentrations of curcumin in the organic solvent (0.01 gcm-3, 0.005 gcm-3 for ethanoland 0.01 gcm-3, 0.0025 gcm-3 for ethyl acetate) are reported. The static synthetic method, using a variable-volume viewcell was employed for obtaining the experimental data in the temperature range of (303 to 333) K and pressures up to 11MPa. Vapor-liquid phase transitions were observed as bubble and dew points for the overall compositions investigated.The phase equilibria of the ternary systems were fitted to the Peng-Robinson equation of state (PR-EoS) using only binarysystem information. Experimental data together with modeling results may constitute relevant information for the precipitationof curcumin using the supercritical antisolvent process.