Dense gas means for extraction of solute from solids

Details Dense gas means for extraction of solute from solids Dense gas means for extraction of solute from solids

B - Operations, Transporting

01

D

B01D 57/00 (2006.01) B01F 1/00 (2006.01)

Patent

CA 2682404

The present invention provides methods and systems for the extraction of solutes from solid matter using dense gases in a mechanical auger separation system, the method comprising: a) passing the insoluble composition comprising solute into a pressurized inclined housing containing an auger; b) combining the insoluble composition with a solvent gas in either the supercritical or liquid phase to dissolve the solute c) maintaining pressure in the housing sufficient to create a biphasic dense gas comprising a vapor phase and a liquid phase; and d) rotating the auger to promote the separation of the insoluble composition from the solute; whereby the solute and the liquid phase o the dense gas flow to the bottom of the auger for removal and the insoluble composition and vapor phase of the dense gas move to th top of the auger for removal, thereby separating the solute from the Insoluble composition.

L'invention concerne des procédés et des systèmes pour l'extraction de solutés à partir d'une matière solide en utilisant des gaz denses dans un système mécanique de séparation à vis sans fin, le procédé comprenant : a) le passage de la composition insoluble comprenant le soluté dans un logement incliné sous pression contenant une vis sans fin; b) la combinaison de la composition insoluble à un gaz solvant en phase super critique ou liquide pour dissoudre le soluté; c) le maintien dans le logement d'une pression suffisante pour créer un gaz dense à deux phases comprenant une phase vapeur et une phase liquide; et d) la rotation de la vis sans fin pour faciliter la séparation de la composition insoluble et du soluté; moyennant quoi le soluté et la phase liquide du gaz dense s'écoulent vers la base de la vis sans fin pour un retrait et la composition insoluble et la phase vapeur du gaz dense se déplacent vers le sommet de la vis sans fin pour un retrait, séparant ainsi le soluté de la composition insoluble.

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