Process for extraction by solvents of hydrophobic compounds

摘要

Solvent extraction of hydrophobic compounds (I) from a crushed mixture which is (virtually) fat-free comprises making the mixture into a kneadable mass or pulp containing NOTLESS 40 wt.% water, mixing with 15-65 wt.% water-soluble organic solvent (III) and also a water-soluble organic solvent and separating in one stage by malaxation in a centrifugal field. Solvent extraction of hydrophobic compounds (I) from a crushed mixture, which a priori is free from fat, oil and wax or strongly defatted, deoiled or dewaxed, with selective apolar extractant(s) (II) comprises (i) making the mixture into a kneadable mass or pulp containing NOTLESS 40 wt.% water, with addition of water before or after crushing if necessary; (ii) mixing with 15-65 wt.% water-soluble organic solvent (III), depending on the water content, and between 10 vol.% and preferably 100 vol.% (II), depending on the (I) content; and (iii) one-stage separation, by malaxation in a centrifugal field, into (a) a solid sediment, (b) an aqueous phase containing (III) and (c) a clearly separate upper phase with relatively low density, consisting of (II) containing dissolved (I)