“CO2 + Propane Mixtures as Near Critical Solvents for Fixed Oils

PABLO E. HEGEL; GUILLERMO D. B. MABE; MARCELO S. ZABALOY; ESTEBAN A. BRIGNOLE

Pittsburgh, USA

Simposio; 11th International Symposium and Exhibit on Supercritical Chromatography, Extraction, and Processing; 2004

Fatty oil and derivatives are usually extracted with near critical fluids. The use of Propane + Carbon Dioxide mixtures can offer special properties regarding solvent power and selectivity. In the present work the phase equilibrium engineering behaviour of mixtures of Propane + Carbon Dioxide and their transition in phase behaviour type is studied. For this purpose is applied a group contribution thermodynamic model, GCA-EOS, tuned for asymmetric mixtures which present complex multiphase behaviour.