Method of selective separation and concentration of gallium...

Details Method of selective separation and concentration of gallium... Method of selective separation and concentration of gallium...

C - Chemistry, Metallurgy

22

B

53/166, 53/167,

C22B 58/00 (2006.01) B01J 45/00 (2006.01) C01G 15/00 (2006.01)

Patent

CA 1218529

METHOD OF SELECTIVE SEPARATION AND CONCENTRATION OF GALLIUM AND/OR INDIUM FROM SOLUTIONS CONTAINING LOW LEVELS OF THEM AND HIGH LEVELS OF OTHER METAL IONS Abstract of the Disclosure A novel method is disclosed which enables gallium and/or indium to be selectively separated and concentrated from a solution containing them in very low concentrations together with many other metal ions in rather high concen- trations. The solution is passed through a bed of a chelat- ing ion exchange resin having an amino carboxylic acid group either immediately or after the pH adjustment. Gallium and/or indium adsorbed on the chelate resin is desorbed by eluting with a mineral acid. The eluate, after the pH adjustment, is passed through another bed of a chelating ion exchange resin having an amino carboxylic acid group, and the resin is treated with a mineral acid to elute the metal ions adsorbed on the resin to thereby recover gallium and/or indium in the form of a concentrated solution.

451450

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