Selective separation of indium by iminodiacetic acid chelating resin

Brazilian Journal of Chemical Engineering

M. C. B. Fortes²  A. H. Martins¹  J. S. Benedetto² 

[1] ,Centro de Desenvolvimento da Tecnologia Nuclear CNEN Belo Horizonte MG ,Brazil

关键词: Indium;    Purification;    Ion exchange;   

DOI  :  10.1590/S0104-66322007000200013

来源: SciELO

【 摘 要 】

Indium can be recovered by treating residues, flue dusts, slags, and metallic intermediates in zinc smelting. This paper investigates the adsorption characteristics of indium and iron on an iminodiacetic acid chelating resin, Amberlite®IRC748 (Rohm and Haas Co.-USA). High concentrations of iron are always present in the aqueous feed solution of indium recovery. In addition, the chemical behaviour of iron in adsorptive systems is similar to that of indium. The metal concentrations in the aqueous solution were based on typical indium sulfate leach liquor obtained from zinc hydrometallurgical processing in a Brazilian plant. The ionic adsorption experiments were carried out by the continuous column method. Amberlite®IRC748 resin had a high affinity for indium under acidic conditions. Indium ions adsorbed onto the polymeric resin were eluted with a 0.5mol/dm³ sulphuric acid solution passed through the resin bed in the column. 99.5% pure indium sulfate aqueous solution was obtained using the iminodiacetic acid chelating resin Amberlite®IRC748.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License