LIQUID/LIQUID EXTRACTION WITH A SOLVENT COMPRISING AT LEAST 5 CARBON ATOMS AND 1 OR 2 OXYGEN ATOMS

摘要

The invention relates to a method for extracting an unsaponifiable fraction contained in an oil or a vegetable butter, in an oil from a microorganism, in a concentrate of oil or vegetable butter or oil from a microorganism, or in a co-product from the plant oil refining industry, such as the deodistillates and the physical refining distillates, or oils from microorganisms, said method comprising at least: A) a step of transforming said oils, said butter or said co-product from the industry of refining vegetable oils or oils from microorganisms in a hydroalcoholic solution, especially via a step of saponification, and B) a step of extracting the hydroalcoholic solution wherein the fatty fraction is separated from the unsaponifiable fraction by a liquid/liquid extraction. Said method is characterised in that at least the step of liquid/liquid extraction of step B is carried out using a first system of solvents comprising a solvent content selected from the solvents comprising at least 5 carbon atoms and one or two oxygen atoms in the form of either an ether function, a ketone function, or an ester function, amounting to at least 50 volume % in relation to the total volume of the first system of solvents, as well as fractions obtained by said method.