| abstract |
The extraction of native products is rendered difficult by the fact that attraction forces act between the liquid native products which are not water-soluble and the tissue incorporating them, and that other constituents are dissolved or present in the form of particles in suspension in the products during the extraction process. The initial substance mixture is, therefore, processed together with a water-soluble, organic solvent and optionally water to form a paste. The addition of the water-soluble, organic solvent enables the substance mixture to be separated cleanly into an aqueous phase and an organic phase in the centrifugal field, no further cleaning being necessary for the organic phase. The process according to the invention has a wide area of application. In principle, it can be applied to all substance mixtures containing liquid, organic substances, in particular to vegetable and animal tissue. It is suitable for extracting oils from oleaginous fruit or waxes from wax-containing plants, as well as for extracting fish oils. |