1. Extraction of indium-tin oxide from end-of-life LCD panels using ultrasound assisted acid leaching
- Author
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Jean-Yves Doisy, Abdelkader Benderrag, Michel Traisnel, Baghdad Ouddane, Ludivine Meunier, Séverine Bellayer, Ulrich Maschke, Christophe Louage, Malika Souada, Nicolas Nuns, Unité Matériaux et Transformations - UMR 8207 (UMET), Institut de Chimie du CNRS (INC)-Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL), Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 (LASIRE), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille Institut (CLIL), Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Université de Lille, ENSCL, CNRS, INRA, Centrale Lille, Univ. Artois, Unité Matériaux et Transformations - UMR 8207 [UMET], Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE], Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS], Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), and Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Materials science ,Acoustics and Ultrasonics ,Sonication ,Kinetics ,chemistry.chemical_element ,02 engineering and technology ,indium ,010501 environmental sciences ,recycling ,01 natural sciences ,WEEE ,indium tin oxide ,law.invention ,Inorganic Chemistry ,chemistry.chemical_compound ,law ,Chemical Engineering (miscellaneous) ,Environmental Chemistry ,Radiology, Nuclear Medicine and imaging ,0105 earth and related environmental sciences ,LCD ,Liquid-crystal display ,ultrasound ,Organic Chemistry ,Sulfuric acid ,021001 nanoscience & nanotechnology ,Indium tin oxide ,[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry ,Chemical engineering ,chemistry ,Leaching (metallurgy) ,0210 nano-technology ,Tin ,Indium - Abstract
International audience; In this report, indium-tin-oxide (ITO)-layer extraction from end-of-life (EOL) Liquid Crystal Displays (LCDs) was discussed by sulfuric acid leaching with simultaneous application of ultrasonication on the ITO-side of glass/ITO panels, exhibiting various dimensions. Applying this technique presents several advantages compared to the traditional leaching process such as fast and controllable kinetics, high extraction yield of indium and tin, selective recovery of these two metals possible, and the opportunity to recycle the neat glass separately avoiding additional separation processes. ITO-dissolution kinetics from EOL LCD panels were investigated as function of leaching time and acidity of sulfuric acid. At a temperature of 60°C, a nearly quantitative indium yield was obtained using an acid concentration of 18 mol/L by simultaneous application of ultrasonication, whereas only 70 % were recovered in the absence of ultrasound. Results from ICP-AES agreed well with SEM/BSE observations demonstrating the high efficiency of the ultrasound assisted process since only 3-4 min were required to obtain maximum ITO recovery.
- Published
- 2018
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