Method of extracting gallium from aluminate solutions

Details Method of extracting gallium from aluminate solutions Method of extracting gallium from aluminate solutions

C - Chemistry, Metallurgy

25

C

204/66.5

C25C 1/22 (2006.01) C22B 58/00 (2006.01)

Patent

CA 1072043

ABSTRACT OF THE DISCLOSURE A method for extracting gallium in concentrations of 0.20 g/l. or greater from aluminate liquor which is recovered from the process of making alumina from aluminate ores comprises the electrolysis of the liquor using a current density of at least 0.002 A/cm2. A solid cathode is used and it is made of tin, lead, indium, zinc or tin/lead alloys into which the gallium may difuse. The diffusion of gallium into the metal of the cathode is such to give a gallium content in the sur- face layer of at least 0.10%.

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