Process for extracting and recovering copper

C - Chemistry – Metallurgy – 22 – B

Patent

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C22B 15/00 (2006.01) C22B 3/30 (2006.01) C22B 3/40 (2006.01)

Patent

CA 2344334

A process for extracting and recovering copper from an aqueous solution containing copper values comprising: (a) contacting the aqueous copper bearing solution with an organic phase comprising a water insoluble and water immiscible solvent solution of an extraction reagent formulation to extract at least a portion of the copper values into the organic phase; (b) separating the resultant copper pregnant organic phase from the copper baren aqueous phase; and (c) recovering the copper values from the copper pregnant organic phase; wherein the extraction reagent formulation comprises (i) an oxime extractant and (ii) an equilibrium modifier in which the modifier is a linear diester or polyester of an unbranched dicarboxylic acid and an unbranched alcohol.

L'invention concerne un procédé relatif à l'extraction et à la récupération de cuivre à partir d'une solution aqueuse renfermant des valeurs de cuivre, qui consiste à: (a) mettre en contact ladite solution avec une phase organique contenant une solution de formulation de réactif d'extraction, à base de solvant insoluble dans l'eau et non miscible avec l'eau, pour extraire au moins une partie des valeurs de cuivre dans la phase organique; (b) à séparer la phase organique résultante, chargée de cuivre, et la phase aqueuse dépourvue de cuivre; et (c) à récupérer les valeurs de cuivre depuis ladite phase chargée. La formulation comprend (i) un extracteur d'oxime et (ii) un modificateur d'équilibre qui est un diester ou un polyester linéaire d'acide dicarboxylique non ramifié et d'alcool non ramifié.

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