Integrated process for the recovery of yttrium and europium from CRT phosphor waste
| Autor: | Koen Binnemans, Lourdes Yurramendi, Federica Forte, Jose Luis Aldana, Bieke Onghena |
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| Rok vydání: | 2018 |
| Předmět: |
High purity
Cathodes General Chemical Engineering Oxalic acid chemistry.chemical_element Phosphor 02 engineering and technology Zinc 010402 general chemistry 01 natural sciences Oxalate Light emission chemistry.chemical_compound Europium Rare earth content General Chemistry Yttrium 021001 nanoscience & nanotechnology 0104 chemical sciences Phosphors Methanesulphonic acid Cathode ray tubes chemistry Leaching Leaching (metallurgy) Calcination 0210 nano-technology Nuclear chemistry |
| Zdroj: | TECNALIA Publications Fundación Tecnalia Research & Innovation |
| ISSN: | 2046-2069 |
| Popis: | An integrated process flow sheet for the recovery of yttrium and europium from waste cathode-ray tube (CRT) phosphors was developed. This flow sheet is based on a sequence of roasting, leaching with organic acids and precipitation steps. Zinc was efficiently removed from the roasted CRT phosphors by leaching with acetic acid, giving access to the rare earth content. Yttrium and europium were quantitatively leached from the residue by a 1 mol L−1 methanesulphonic acid (MSA) solution. Precipitation with oxalic acid gave a mixed Y/Eu oxalate of high purity (>99 wt%). Co-precipitation of zinc was less than 2 wt%. This work has received funding from the European Union's Horizon 2020 Research and Innovation Programme under Grant Agreement No 680629 (REMAGHIC: New Recovery Processes to produce Rare Earth-Magnesium Alloys of High Performance and Low Cost) (project website: http://www.remaghic-project.eu). The authors acknowledge Relight srl (Rho, Italy) for providing the CRT phosphor powder. |
| Databáze: | OpenAIRE |
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