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Open AccessArticle

Leaching Chalcopyrite with an Imidazolium-Based Ionic Liquid and Bromide

1
Departamento de Ingeniería Metalúrgica y Minas, Universidad Católica del Norte, Av. Angamos 610, Antofagasta 1270709, Chile
2
Faculty of Engineering and Architecture, Universidad Arturo Prat, Almirante Juan José Latorre 2901, Antofagasta 1244260, Chile
3
Escuela de Ingeniería Química, Pontificia Universidad Católica de Valparaíso, Valparaíso 2340000, Chile
4
Departamento de Ingeniería en Metalurgia, Universidad de Atacama, Copiapó 1531772, Chile
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Department of Mining, Geological and Cartographic Department, Universidad Politécnica de Cartagena, 30203 Murcia, Spain
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Facultad de Metalurgia, Universidad Autónoma de Coahuila, Carretera 57 Km 5, Monclova C.P. 25710, Mexico
7
Departamento de Ingeniería Química y Procesos de Minerales, Universidad de Antofagasta, Antofagasta 1270300, Chile
*
Authors to whom correspondence should be addressed.
Metals 2020, 10(2), 183; https://doi.org/10.3390/met10020183
Received: 10 December 2019 / Revised: 23 January 2020 / Accepted: 24 January 2020 / Published: 27 January 2020
(This article belongs to the Special Issue Advances in Mineral Processing and Hydrometallurgy)
The unique properties of ionic liquids (ILs) drive the growing number of novel applications in different industries. The main features of ILs are high thermal stability, recyclability, low flash point, and low vapor pressure. This study investigated pure chalcopyrite dissolution in the presence of the ionic liquid 1-butyl-3-methylimidazolium hydrogen sulfate, [BMIm]HSO4, and a bromide-like complexing agent. The proposed system was compared with acid leaching in sulfate media with the addition of chloride and bromide ions. The results demonstrated that the use of ionic liquid and bromide ions improved the chalcopyrite leaching performance. The best operational conditions were at a temperature of 90 °C, with an ionic liquid concentration of 20% and 100 g/L of bromide. View Full-Text
Keywords: leaching; chalcopyrite; ionic liquid; bromide leaching; chalcopyrite; ionic liquid; bromide
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MDPI and ACS Style

Rodríguez, M.; Ayala, L.; Robles, P.; Sepúlveda, R.; Torres, D.; Carrillo-Pedroza, F.R.; Jeldres, R.I.; Toro, N. Leaching Chalcopyrite with an Imidazolium-Based Ionic Liquid and Bromide. Metals 2020, 10, 183.

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