Integrated process for the recovery of yttrium and europium from CRT phosphor waste
作者： Federica Forte , Lourdes Yurramendi , José Luis Aldana , Bieke Onghena , Koen Binnemans
DOI: 10.1039/C8RA08158A
关键词: Oxalate 、 Light emission 、 Chemistry 、 Europium 、 Yttrium 、 Zinc 、 Phosphor 、 Leaching (metallurgy) 、 Nuclear chemistry 、 Oxalic acid
摘要: An integrated process flow sheet for the recovery of yttrium and europium from waste cathode-ray tube (CRT) phosphors was developed. This is based on a sequence roasting, leaching with organic acids precipitation steps. Zinc efficiently removed roasted CRT by acetic acid, giving access to rare earth content. Yttrium were quantitatively leached residue 1 mol L−1 methanesulphonic acid (MSA) solution. Precipitation oxalic gave mixed Y/Eu oxalate high purity (>99 wt%). Co-precipitation zinc less than 2 wt%.
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