Ferric fluoborate/organic extractant hydrometallurgical...

C - Chemistry – Metallurgy – 22 – B

Patent

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C22B 3/38 (2006.01) C22B 3/06 (2006.01) C22B 3/10 (2006.01) C22B 3/30 (2006.01) C22B 7/00 (2006.01) C22B 13/06 (2006.01) C22B 15/00 (2006.01) C22B 15/14 (2006.01) C22B 19/32 (2006.01) C22B 30/00 (2006.01) C25C 1/12 (2006.01) C25C 1/18 (2006.01)

Patent

CA 2252849

A method is provided for the hydrometallurgical recovery of metal values from sources containing more than one metal of antimony, lead, copper, zinc, bismuth, tin, cadmium and other metals by leaching the metal containing source with a ferric fluoborate/fluroboric acid solution to provide a leachant metal containing solution. The leachant solution is contacted with specific organic extractants such as an organophosphoric acid ester, an alkyl salicylaldoxime and an amidobis(thiophosphoryl) compound in a series of extraction steps to separate metals based on the extractant used. The organic extractant solution is stripped of the extracted metal(s) and the metal(s) recovered. The remaining leach solution after extraction being either further treated to extract other metals or processed to provide metal values contained therein.

Méthode pour extraction hydrométallurgique des métaux précieux contenus dans des sources renfermant plus d'un métal parmi les suivants: antimoine, plomb, cuivre, zinc, bismuth, étain, cadmium et autres, en lessivant la source contenant le métal avec une solution fluoborate ferrique/acide fluoborique pour obtenir une solution de lessivage contenant du métal. Cette solution de lessivage est mise en contact avec de solvants d'extraction organiques spécifiques tels un ester acide organophosphorique, un alkyle salicylaldoxime et un composé amidobis(thiophosphoryl) au cours d'une série de mesures d'extraction, afin de séparer les métaux par l'utilisation d'un solvant d'extraction spécifique. Le métal ou les métaux récupérés sont ensuite réextraits de la solution d'extraction. La solution de lessivage restante est ensuite soumise encore une fois au même procédé pour extraire d'autre métaux ou traitée en vue de récupérer les métaux précieux qu'elle contient.

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