C - Chemistry – Metallurgy – 01 – D
Patent
C - Chemistry, Metallurgy
01
D
C01D 3/04 (2006.01) B01D 9/00 (2006.01) B01D 61/00 (2006.01) C01D 3/06 (2006.01) C01D 3/08 (2006.01) C01D 3/14 (2006.01) C01D 3/16 (2006.01)
Patent
CA 2680182
A method of separating potassium chloride and sodium chloride from a heated solution of these salts, such as a solution obtained from potash ore, to recover potassium chloride from the ore is disclosed. The method includes a combination of steps of (a) extracting water from a heated solution containing potassium chloride and sodium chloride using a membrane system and (b) subsequently cooling the solution discharged from the membrane system, whereby steps (a) and (b) make it possible to selectively recover potassium chloride and sodium chloride from the solution.
L'invention porte sur un procédé de séparation du chlorure de potassium et du chlorure de sodium à partir d'une solution chauffée de ces sels, telle qu'une solution obtenue à partir du minerai de potasse, afin de récupérer le chlorure de potassium contenu dans le minerai. Le procédé comporte une combinaison d'étapes consistant à (a) extraire de l'eau d'une solution chauffée contenant du chlorure de potassium et du chlorure de sodium à l'aide d'un système à membrane; (b) puis de refroidir la solution déchargée du système à membrane. Les étapes (a) et (b) permettent de récupérer de façon sélective le chlorure de potassium et le chlorure de sodium contenus dans la solution.
John Batterham Robin
Walter Shaw Raymond
Baker & Mckenzie Llp
Technological Resources Pty. Limited
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