Freiberger win rare earth phosphor from waste

by on 4. December 2014

The method is now used in lighting company Narva

Freiberg, 4. December 2014: Every day in Germany actually strategically important raw materials such as the "rare earth" bury worth several thousand euros in underground landfills as hazardous. Chemists at the Bergakademie Freiberg have now developed a technology collaboration with industry partners, to these elements from the group of "rare earth" recover high purity. This "SepSelsa" method ("Separation of rare earths from waste disposal duty in Saxony") was "a quantum leap in the rare earth recycling", assessed the TU Freiberg.

Process is now used in Narva

Containing these elements are, for example, in ancient smartphones, extinct neon lights and screened computer screens. In order to recover it, hat das Institute for Technical Chemistry an der Bergakademie einen Trennprozess für die Produktionsabfälle in der Leuchtenfirma „Narva“ in Brand Erbisdorf erdacht. The "FNE disposal services Freiberg GmbH" work these rare earth phosphors then continue on, to the recovered raw material then to be delivered to Narva and to enable a closed circuit, shared with the researchers.

Managed to jump from laboratory to industrial scale

"In fact, it is one of the few methods, who have made the leap from the laboratory to industrial production, while at the same time economically ", explained Prof. Martin Bertaut, Director of the Institute for Technical Chemistry. "Its importance lies in the fact, that we reappraise it easy to track all phosphors regardless of their Seltenerdgehalten out. The big trick: We isolate the metals in pure form, - without countless plates, as is the case in classical rare earth processing. "But even the poisonous mercury would highly pure extracts. Das sächsische Wissenschaftsministerium hat die Freiberger für diese Entwicklung als beispielhaftes Technologie-Transfer-Projekt "wissen.schafft.arbeit" award in the competition.

Freiberg distinguishes itself as a research resource site

Freiberg has been trying for some time about, itself as a leading center for ecological resource recovery. Neben der Bergakademie hat sich darauf unter anderem auch ein Freiberger Außeninstitut des Helmholtz-Zentrums Dresden-Rossendorf (HZDR) auf diese wirtschaftsstrategisch wichtige Sparte spezialisiert. Author: Heiko Weckbrodt

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