Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 164, Issue -, Pages 19-27Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.seppur.2016.03.007
Keywords
Copper recovery; Printed circuit boards; Hydrometallurgy; Bispicolylamine resin
Categories
Funding
- FCT/MEC - Portugal through national funds [UID/QUI/50006/2013]
- FEDER - Portugal [PT2020]
- FCT [SFRH/BD/8729/2012]
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The large amount of Cu present in printed circuit boards (PCBs) residues, usually about ten times more than the Cu amount present in rich-content minerals, makes these residues an attractive secondary source of Cu. Thus, the main aim of this work was to develop a simple and nearly-closed two-step process to recover Cu from PCBs residues with high purity. Firstly, a multi-element leaching solution, containing 78% of the total amount of Cu present in the residue together with other metals, was obtained using acidic (HNO3 2 mol/L for 210' at 50 degrees C) conditions. In a second step, a bispicolylamine resin was used to recover Cu with high selectivity from the multi element (59.0% Cu) leaching solution and a final Cu solution with high purity (99.0%) was obtained after eluting, with H2SO4 4 mol/L, the Cu retained in the column. Additionally, the amount of Al (85%) leached from the residue, present in the raffinate, was totally recovered as a solid of Al(OH)(3). (C) 2016 Elsevier B.V. All rights reserved.
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