Process for removing dissolved selenium values from an acidic aqueous copper sulphate solution
AssigneeSherritt Gordon Mines Limited
InventorZoenek Hofirek
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Abstract
Dissolved selenium values are removed from an acidic aqueous copper sulphate solution by treating the solution at a temperature of at least about 140.degree. C. with a stoichiometric excess relative to the dissolved selenium of sulphur dioxide or a sulphite solution to produce a selenium-containing precipitate and dissolved cuprous copper. The temperature of the treated solution is maintained at at least about 140.degree. C. and an oxygen containing gas is passed into the treated solution under a pressure of at least about 350 kPa to oxidize dissolved cuprous copper to dissolved cupric copper.
Claims9
A process for removing dissolved selenium values from an acidic aqueous copper sulphate solution comprising treating the solution at a temperature of at least about 140.degree. C. with a stoichiometric excess relative to the dissolved selenium of selenium-reducing compound selected from the group consisting of sulphur dioxide and a sulphite solution to produce a selenium-containing precipitate and dissolved cuprous copper, maintaining the temperature of the treated solution at at least about 140.degree. C. and passing an oxygen-containing gas into the treated solution under a pressure of at least about 350 kPa to oxidize dissolved cuprous copper to dissolved cupric copper.
Dependencies are inferred from the claim text.