Purification method

B - Operations – Transporting – 01 – D

Patent

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B01D 17/02 (2006.01) C23G 1/36 (2006.01)

Patent

CA 2174335

A method of purifying contaminated degreasing liquids comprises (a) adding a collection polymer or polymer mixture forming two phases to the degreasing liquid; (b) mixing the collection polymer with the degreasing liquid; (c) separating the collection polymer and the degreasing liquid gravimetrically, whereby the collection polymer and the major part of the contaminants form a hydrophobic bottom phase and the degreasing agent forms a hydrophilic top phase; (d) removing the bottom phase; and (e) reusing the top phase directly or for further processing.

Procédé d'épuration de liquides dégraissants contaminés, consistant (a) à ajouter au liquide dégraissant un polymère capteur ou mélange de polymères capteurs formant deux phases; (b) à mélanger le polymère capteur au liquide dégraissant; (c) à séparer de manière gravimétrique le polymère capteur du liquide dégraissant, de sorte que le polymère capteur et la plupart des contaminants forment une phase inférieure hydrophobe, et que l'agent dégraissant forme une phase supérieure hydrophile; (d) à évacuer la phase inférieure; et (e) à réutiliser directement la phase supérieure ou à la soumettre à un traitement supplémentaire.

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