PROCESSES FOR SELECTIVE EXTRACTION OF UNSAPONIFIABLE MATERIALS FROM RENEWABLE RAW MATERIALS BY LIQUID-LIQUID EXTRACTION IN THE PRESENCE OF A COSOLVENT

摘要

A method for extracting an unsaponifiable fraction from a solid renewable raw material, includes the extraction of the fats from the solid renewable raw material, leading to the production of an oil, the concentration of the oil so as to obtain a mixture enriched in unsaponifiable fraction, and the liquid-liquid extraction of the mixture enriched in unsaponifiable fraction, in the presence of at least one polar organic solvent and at least one non-polar cosolvent immiscible with the polar organic solvent, resulting in the formation of an organic polar phase enriched in lipids functionalized with one or more function(s) chosen from hydroxyl, epoxide, ketone, thiol, aldehyde, ether and amine functions, and to the formation of a non-polar organic phase enriched in lipids containing no or few hydroxyl, epoxide, ketone, thiol, aldehyde, ether and amine function(s), then the concentration of the organic phases.