A simple and nearly-closed cycle process for recycling copper with high purity from end life printed circuit boards
作者： Isabel F.F. Neto , Cátia A. Sousa , Margarida S.C.A. Brito , Aurora M. Futuro , Helena M.V.M. Soares
DOI: 10.1016/J.SEPPUR.2016.03.007
关键词: Inorganic chemistry 、 Materials science 、 Hydrometallurgy 、 Copper 、 High selectivity 、 Metallurgy 、 Raffinate 、 Residue (chemistry) 、 Leaching (metallurgy) 、 Printed circuit board
摘要: Abstract The large amount of Cu present in printed circuit boards (PCBs) residues, usually about ten times more than the rich-content minerals, makes these residues an attractive secondary source Cu. Thus, main aim this work was to develop a simple and nearly-closed two-step process recover from PCBs with high purity. Firstly, multi-element leaching solution, containing 78% total residue together other metals, obtained using acidic (HNO 3 2 mol/L for 210′ at 50 °C) conditions. In second step, bispicolylamine resin used selectivity (59.0% Cu) solution final purity (99.0%) after eluting, H 2 SO 4 4 mol/L, retained column. Additionally, Al (85%) leached residue, raffinate, totally recovered as solid Al(OH) .
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