A method for extracting vegetable oils and a counterflow...

C - Chemistry – Metallurgy – 11 – B

Patent

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C11B 1/10 (2006.01)

Patent

CA 2562410

The invention relates to an oil and fat industry, in particular, to production of vegetable oils by a method of extraction by organic solvents. Aim of the invention is to provide such method of the vegetable oils extraction, such device for its implementation, and such extractor of a submersible type being a part of the device, which allow to increase intensity of mass exchange at the extraction stage, to increase concentration and purity of produced miscella, providing heightening output of the extracted oil and improving its quality, and also to obtain defatted meal suitable for further processing. For achieving these aims, the process is carried out at a temperature of phase transformation "fluid-vapor" in conditions of cavitation and intensive mixing of the solvent in non-mixed surrounding of a solid phase of the material under extraction, and solvent vapors, which are produced in this process, are removed, condensed and returned back into the process, providing the re- circulation of the solvent.

L'invention se rapporte à l'industrie d'huiles et de graisses, et notamment à la fabrication d'huile végétale au moyen d'un procédé d'extraction par solvants organiques. L'invention vise un procédé d'extraction d'huiles végétales, un dispositif destiné à la mise en oeuvre de ce procédé, et un extracteur de type submersible, qui fait partie du dispositif; elle permet d'augmenter l'intensité d'échanges massiques au stade d'extraction, d'augmenter la concentration et la pureté du miscella produit, d'assurer une sortie plus élevée d'huile extraite et d'améliorer sa qualité, et également d'obtenir des aliments dégraissés destinés à un traitement ultérieur. Pour réaliser ces objectifs, le procédé est mis en oeuvre à une température de transformation de phase "fluide - vapeur", dans des conditions de cavitation et de mélangeage intensif du solvant dans un environnement non mélangé d'une phase solide du matériau soumis à l'extraction; les vapeurs de solvant, générées pendant le processus, sont évacuées, condensées et renvoyées dans le circuit de processus, ce qui permet la récupération du solvant.

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