Method for the recovery of germanium

Details Method for the recovery of germanium Method for the recovery of germanium

C - Chemistry, Metallurgy

22

B

53/165

C22B 41/00 (2006.01) C01G 17/00 (2006.01)

Patent

CA 1238192

ABSTRACT OF THE DISCLOSURE A process for the recovery of germanium includes acid leaching of germanium-containing oxidic material and neutralization to pH 3-5 in the presence of ferris iron, whereby a precipitate is obtained. The precipitate is releached in acid and the leach slurry is reduced with at least one reductant chosen from zinc sulfide concentrate, lead sulfide concentrate and iron. Preferably, lead sulfide concentrate and iron are used in a two-step reduction following the reteach. Germanium in the reduced solution is precipitated as germanium sulfide. The use of lead or zinc sulfide concentrate and iron results in a reduction of arsenic and antimony in and a substantial elimination of copper from the germanium sulfide-containing concentrate.

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