Process for copper and/or precious metal recovery
AssigneeCurtin University of Technology
InventorsJacobus Johannes Eksteen, Elsayed Abdelrady Oraby
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Abstract
A process for recovery of metal comprising copper and/or a precious metal from a metal containing material, including the steps of: leaching the metal containing material with an alkaline lixiviant and an amino acid or derivative thereof in order to produce a metal containing leachate; and extracting the metal from the leachate.
Claims15
A process for recovery of metal comprising copper and/or a precious metal from a metal containing material, including the steps of:
- leaching the metal containing material with an aqueous alkaline solution having a pH of at least 9 and containing a lixiviant comprising an amino acid or derivative thereof in order to produce a metal containing leachate;
- and
- extracting the metal from the leachate,
- wherein the amino acid comprises glycine.
A differential leaching process for recovery of copper and precious metal from a copper and precious metal containing material, including the steps of:
- leaching the copper and precious metal containing material with an alkaline solution containing a lixiviant comprising an amino acid or derivative thereof under first conditions comprising ambient temperature and/or the absence of an oxidant in order to produce a copper containing leachate and precious metal containing residue;
- leaching the precious metal containing residue with an alkaline solution containing a lixiviant comprising an amino acid or derivative thereof under second conditions comprising elevated temperature and/or the presence of an oxidant, in order to produce a precious metal containing leachate;
- extracting the copper from the copper containing leachate;
- and
- extracting the precious metal from the precious metal containing leachate.
A process for recovery of metal comprising copper and/or a precious metal from a metal containing material, including the steps of:
- leaching the metal containing material with an aqueous alkaline solution containing a lixiviant comprising an amino acid derivative in order to produce a metal containing leachate, wherein the amino acid derivative comprises a peptide;
- and
- extracting the metal from the leachate.
Dependencies are inferred from the claim text.