Elution process for gold-iodine complex from ion-exchange...

C - Chemistry – Metallurgy – 22 – B

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C22B 3/22 (2006.01) B01J 41/12 (2006.01) B01J 49/00 (2006.01) C01G 7/00 (2006.01) C22B 3/42 (2006.01) C22B 11/00 (2006.01)

Patent

CA 2016562

A process for eluting a gold-iodine complex from a strongly basic anion-exchange resin on which the complex is adsorbed is described. The process involves recovering a gold-iodine complex by adsorption with a strongly basic anion-exchange resin from a wash solution containing a low concentration of gold-iodine complex that results from iodine-aided leaching of gold from a gold-containing material, and thereafter eluting the complex from the resin. This method is useful for the washing system associated with a lixivial process using an iodine/iodide lixiviant, such as in situ, heap, vat, or agitated leaching.

Méthode pour l'élution d'un complexe d'or et d'iode provenant d'une résine échangeuse d'anion fortement basique sur laquelle le complexe est adsorbé. La méthode consiste à récupérer un complexe d'or-iode par adsorption avec une résine échangeuse d'anion fortement basique, à partir d'une solution de lavage renfermant une faible concentration de ce complexe provenant de la lixiviation à l'iode de l'or d'un matériau aurifère, puis à éluer ce complexe à partir de la résine. Cette méthode est utile pour les systèmes de lavage associés à un procédé de lixiviation à l'aide d'un lixiviant à base d'iode et d'iodure, notamment pour les lessivages sur place, en tas, en cuve ou avec agitation.

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