Liquid-liquid extraction

B - Operations – Transporting – 01 – D

Patent

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B01D 11/04 (2006.01) B01D 19/00 (2006.01)

Patent

CA 2659078

A liquid-liquid extraction process that uses counterflowing liquid phases, especially in conjunction with a reciprocating plate extraction column, wherein one of the liquid phases has a lower density than the other and is at least partially saturated with a dispersible gas, requires less plate stack height or a smaller column diameter when plate-to-plate spacing is non-uniform rather than uniform and such non-uniform plate-to-plate spacing includes greater plate-to-plate spacing proximate to raffinate liquid discharge than proximate to feed of the lower density liquid phase.

L'invention concerne un procédé d'extraction liquide-liquide utilisant des phases liquides à contre-courant, notamment conjointement avec une colonne d'extraction à plateau à mouvement alternatif, l'une des phases liquides ayant une densité inférieure à l'autre et étant au moins partiellement saturée par un gaz dispersible, nécessite une moindre hauteur d'empilement de plateaux ou un diamètre de colonne plus petit lorsque l'espacement de plateau à plateau est non uniforme plutôt qu'uniforme et un tel espacement plateau à plateau non uniforme comprend un espacement plateau à plateau plus grand à proximité de la décharge du liquide de raffinat plutôt qu'à proximité de l'alimentation de la phase liquide de faible densité.

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