Supercritical fluid fractionation of fatty acid ethyl esters from butteroil

Experimental countercurrent supercritical fluid extraction equipment. The device comprises a 100-cm high column (12mm internal diameter) packed with Fenske rings, 2 separator cells of 270-mL capacity each (S1 and S2) and a cryogenic trap at atmospheric pressure. Both CO₂ and liquid feed sample were preheated at the exit of their respective pumps before introduction into the extraction column.

Composition of fatty acid ethyl esters in the raffinates versus pressure at 60°C for the different fatty acid ethyl esters from butteroil.