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Le recyclage des déchets d’équipements électriques et électroniques… On n’arrête pas le progrès !

Abstract : High Tech products, smartphones, LCD screens, hybrid vehicles, CD-DVDs, rechargeable batteries, etc. which make our day-to-day life, require rare metals whose production is controlled by a limited number of countries, mainly China, Russia, the Democratic Republic of Congo and Brazil. The specific supply risks linked to the oligopoly or quasi-monopoly situations of these strategic metals have prompted the European Union to look for alternative supply routes, the first being the recycling of spent electronic and electrical equipment. Among these, indium and lanthanum are elements that have many high tech applications. Indium is a rare metal associated with the mining of zinc and tin, largely dominated by China. Lanthanum, like all rare earths, does not exist individually in deposits, but is also associated with other metals. The recycling of indium and lanthanum contained in end-of-life equipment therefore appears to be the only alternative to addressing the risks of scarcity. And, beyond the economic and strategic aspects, the recycling of these metals can be an interesting alternative to reduce the large-scale exploitation of mineral deposits containing them and thus to preserve the environment. In this context we propose a process for lanthanum electroplating and indium extraction and electrodeposition in weakly hygroscopic ionic liquids, 1-octyl-1-methyl-pyrrolidinium bis (trifluoromethylsulfonyl) imide and 1-butyl-1-ethylpiperidinium bis (trifluoromethylsulfonyl ) imide.
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Submitted on : Friday, February 4, 2022 - 3:39:20 PM
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M. Draye, Sophie Legeai, youssouf Traore, Jonathan Szymczak. Le recyclage des déchets d’équipements électriques et électroniques… On n’arrête pas le progrès !. L'Actualité Chimique, Société chimique de France, 2018, pp.100-104. ⟨hal-01840686⟩



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