Patent ID: 6265593
Filing Date: 2001-07-24
Classification: A23L,C11B

Abstract:
A process for solvent extraction of hydrophobic compounds from a substantially fat-, oil- and wax-free comminuted substance mixture by means of at least one nonpolar extraction solvent selectively solving and extracting the said hydrophobic compounds, comprising:working said substance mixture, and optionally adding water prior to, or after, said comminutation depending on the dry matter content of said substance mixture, into a kneadable mass having a water content of not less than about 40% by weight of the weight of the substance mixture inclusive of the optional water added,working a water-soluble organic solvent and said at least one extraction solvent into said substance mixture or said mass, the amount of said water-soluble organic solvent being chosen depending on the water content of the mass, in a range from about 15% per weight to about 65% by weight of the aqueous phase containing said water-soluble organic solvent and, the amount of said at least one extraction solvent being chosen depending on the content of hydrophobic compounds in the substance mixture, in a range between about 10% by volume and preferably 100% by volume of the volume of the aqueous mass, inclusive of the water-soluble organic solvent, andseparating said mass, after malaxing, in a centrifugal field in one step into a solid sediment, an aqueous phase containing the water-soluble organic solvent, and an extraction solvent phase which is separated from the aqueous phase by a clear phase boundary and forms the upper phase of the a phase picture obtained after said one-step centrifugation, said extraction solvent phase having a lower density than the aqueous phase containing the water-soluble organic solvent.