Purification of copper sulfate solution

Details Purification of copper sulfate solution Purification of copper sulfate solution

C - Chemistry, Metallurgy

01

G

23/89

C01G 3/10 (2006.01)

Patent

CA 1089188

ABSTRACT OF THE DISCLOSURE A process for purifying copper sulfate solution by converting contained hexavalent selenium to tetravalent selenium which is amenable to removal from solution by heating and maintaining the solution at a temperature in the range of about 135 to 220°C under a non-oxidizing atmosphere in the presence of bivalent iron. The converted selenium is removed from the solution either by co-precipitation with ferrous iron oxidized and hydrolyzed to ferric oxide at a temperature in the range of 135 to 220°C and under an oxygen pressure of about 140 to 450 kPa or by cementation with a metal powder at a temperature in the range of about 25 to 85°C at about ambient pressure under a non-oxidizing atmosphere.

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