Process for the continuous fractionation of a mixture of fatty acids

A process for fractionation of a mixture of fatty acids, including derivatives thereof, containing polyunsaturated fatty acids, including derivatives thereof, for obtaining a fraction enriched with the polyunsaturated fatty acids, including derivatives thereof, comprising reacting the mixture with urea in solution for forming a reaction medium and then pumping the reaction medium to and through at least one and up to four scraped-surface heat exchangers and then to and through a dwell pipe provided with cooling means for cooling the reaction medium for forming a dispersion of a solid inclusion complex and a liquid phase and then separating the liquid phase from the inclusion complex for obtaining the enriched fraction from the liquid phase.