Effect of 1-Butyl-3-Methylimidazolium Based Ionic Liquids with Different Anions on Copper Recovery From Copper Anode Slime
Abstract
In this study, the usage of 1-butyl-3-methylimidazolium based ionic liquids (ILs) with different anions (HSO4-, Cl- and BF4-) was investigated for copper recovery from anode slime.Initially, chemical composition and mineralogical structure of anode slime (AS) were determined by ICP-MS, fire assaying and XRD methods. The anode slime used in the leaching experiments includes %23.1 Cu, 15.42 Pb and 20.5% Sn as major elements. The anion effects of 1-butyl-3-methylimidazolium based ionic liquids were studied under conditions of %50 ionic liquid concentrations at 50 oC reaction temperature and 1/20 g/mL solid/liquid ratio with reaction time in range of 1-8 hours. According to the experimental results, the copper recovery increased by increasing leaching time for all ionic liquids. The most effective ionic liquid on copper recovery was determined as 1-butyl-3-methylimidazolium hydrogen sulphate (BmimHSO4) and 27.7% of copper recovery was obtained after 8 hours of leaching time at 50 oC.
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