Process for recovering metals from resins

C - Chemistry – Metallurgy – 22 – B

Patent

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Details

C22B 3/24 (2006.01) C22B 3/42 (2006.01) C22B 11/00 (2006.01)

Patent

CA 2652825

A process for recovering metals involving ion exchange comprising the step of recovering metal species from an ion exchange resin by elution of the resin with an eluent system containing (i) a first sulphite component comprising at least one of sulphite and bisulphite ion; and (ii) a second eluting component comprising any species which favours the ion exchange or desorption of a metal species from the resin during elution wherein the presence of the sulphite component (i) increases metal elution efficiency relative to the situation where an eluent comprises the second eluting component alone.

L'invention concerne un procédé de récupération de métaux comprenant un échange ionique, comprenant une étape consistant à récupérer des espèces métalliques à partir d'une résine échangeuse d'ions par élution de la résine avec un système d'éluant contenant (i) un premier composant sulfite comprenant au moins un élément parmi un ion sulfite et bisulfite; et (ii) un second composant d'élution comprenant une espèce quelconque favorisant l'échange ionique ou la désorption d'une espèce métallique de la résine durant l'élution, la présence du composant sulfite (i) augmentant l'efficacité d'élution du métal en comparaison à la situation où un éluant ne comprend que le second composant d'élution seul.

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