Selective Reduction and Separation of Europium from Mixed Rare-Earth Oxides from Waste Fluorescent Lamp Phosphors View Full Text


Ontology type: schema:Chapter     


Chapter Info

DATE

2017-02-05

AUTHORS

Mark L. Strauss , Brajendra Mishra , Gerard P. Martins

ABSTRACT

Europium is a critical material required for LED, florescent lamp, cell phone screen, and flat panel display production. This process recycling europium from waste lamp phosphors is an innovative method to supply europium for high technology applications. Waste phosphor powder from recycled lamps is retorted, sieved, and leached to produce a europium/yttrium leach solution. The separation of europium and yttrium from the pregnant leach solution is conducted by selectively reducing Eu(III) to Eu(II) via zinc powder and precipitating europium (II) sulfate from solution using sulfuric acid as the precipitating agent. After one stage of selective reduction and precipitation, the purity and recovery of europium (II) sulfate was greater than 95% and 80%, respectively. More... »

PAGES

31-36

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-3-319-51085-9_3

DOI

http://dx.doi.org/10.1007/978-3-319-51085-9_3

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1083542044


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