Use of nonionic surfactants in metal extraction by electrolysis

Details Use of nonionic surfactants in metal extraction by electrolysis Use of nonionic surfactants in metal extraction by electrolysis

C - Chemistry, Metallurgy

25

C

C25C 1/00 (2006.01) C25B 1/00 (2006.01) C25D 3/00 (2006.01)

Patent

CA 2597937

The invention relates to a method for electrolytically treating metal- containing solutions, during which at least one nonionic surfactant is used in the electrolyte solution, and this surfactant reduces, by 20 to 60 %, the surface tension of the electrolyte solution having a surfactant concentration of 0.2 % by weight and at a temperature of 24 ~C in an aqueous solution with 190 g/l of sulfuric acid and 157 g/l of copper sulfate that is diluted with water in a ratio of 1: 10. The inventive method is suited for extracting or purifying metals, such as copper, chromium, nickel, zinc, gold and silver.

L'invention concerne un procédé permettant de traiter des solutions à base de métal, selon lequel il est prévu d'utiliser, dans la solution électrolytique, au moins un tensioactif non ionique, ledit tensioactif abaissant de 20 à 60% la tension superficielle de la solution électrolytique, pour une concentration en tensioactif de 0,2% en poids et à une température de 24°C, dans une solution aqueuse comportant 190 g/l d'acide sulfurique et 157 g/l de sulfate de cuivre, ladite solution aqueuse étant diluée dans un rapport de 1 : 10 avec de l'eau. Ledit procédé se prête à l'extraction ou à la purification de métaux, comme le cuivre, le chrome, le nickel, le zinc, l'or et l'argent.

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