Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1984-04-04
1985-05-14
Cintins, Ivars
Liquid purification or separation
Processes
Ion exchange or selective sorption
210670, 210688, 423112, B01D 1504
Patent
active
045170967
ABSTRACT:
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 concentrations. The solution is passed through a bed of a chelating 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.
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Hirai Masahide
Ishibashi Kodo
Kondo Kozo
Masuda Hitoshi
Sekine Kunio
Cintins Ivars
Dowa Mining Co. Ltd.
Unitika Ltd.
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