This work presents three aplications of SFE with different supercritical fluids, samples and extraction systems. A home made static system was utilized in the search for alternative chemicals and energetics resources such as sugar cane bagasse and mineral coal. Ethanol (with and without catalyst) and toluene were used, respectively ,as extraction fluids and hydrogen as pressurization gas. The adsorbed contaminants of mineral oil in bauxite were also extracted with carbon dioxide as extractor fluid in a home made dinamical system. Maximization of yields in some processes was studied using factorial design and response surface methodologies. The products obtained from the sugar cane bagasse and those contaminants adsorbed in bauxite insulating oil and extracted with supercritical fluids were characterized using HRGC - FID and HRGC - MS after fractionation in eight fractions by preparative liquid chromatography.
SFE (Supercritical Fluid Extraction); coal; sugar cane bagasse; insulating oil contaminants
