Abstract
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%.
| Original language | English |
|---|---|
| Pages (from-to) | 1378-1386 |
| Number of pages | 9 |
| Journal | RSC Advances |
| Volume | 9 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2019 |
Keywords
- Cathode ray tubes
- Calcination
- Cathodes
- Europium
- Leaching
- Light emission
- Oxalic acid
- Phosphors
- Rare earth content
- Methanesulphonic acid
- High purity
Project and Funding Information
- Project ID
- info:eu-repo/grantAgreement/EC/H2020/680629/EU/New Recovery Processes to produce Rare Earth -Magnesium Alloys of High Performance and Low Cost/REMAGHIC
- Funding Info
- 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.