Leaching chalcopyrite with an imidazolium-based ionic liquid and bromide

Marcelo Rodríguez; Luís Ayala; Pedro Robles; Rossana Sepúlveda; David Torres; Francisco Raul Carrillo-Pedroza; Ricardo I. Jeldres; Norman Toro

doi:10.3390/met10020183

Leaching chalcopyrite with an imidazolium-based ionic liquid and bromide

Marcelo Rodríguez, Luís Ayala, Pedro Robles, Rossana Sepúlveda, David Torres, Francisco Raul Carrillo-Pedroza, Ricardo I. Jeldres, Norman Toro

SCHOOL OF CHEMICAL ENGINEERING

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

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.

Original language	English
Article number	183
Journal	Metals
Volume	10
Issue number	2
DOIs	https://doi.org/10.3390/met10020183
State	Published - Feb 2020

Keywords

Bromide
Chalcopyrite
Ionic liquid
Leaching

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10.3390/met10020183

Cite this

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title = "Leaching chalcopyrite with an imidazolium-based ionic liquid and bromide",

abstract = "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.",

keywords = "Bromide, Chalcopyrite, Ionic liquid, Leaching",

author = "Marcelo Rodr{\'i}guez and Lu{\'i}s Ayala and Pedro Robles and Rossana Sep{\'u}lveda and David Torres and Carrillo-Pedroza, {Francisco Raul} and Jeldres, {Ricardo I.} and Norman Toro",

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T1 - Leaching chalcopyrite with an imidazolium-based ionic liquid and bromide

AU - Rodríguez, Marcelo

AU - Ayala, Luís

AU - Robles, Pedro

AU - Sepúlveda, Rossana

AU - Torres, David

AU - Carrillo-Pedroza, Francisco Raul

AU - Jeldres, Ricardo I.

AU - Toro, Norman

PY - 2020/2

Y1 - 2020/2

N2 - 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.

AB - 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.

KW - Bromide

KW - Chalcopyrite

KW - Ionic liquid

KW - Leaching

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VL - 10

JO - Metals

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Leaching chalcopyrite with an imidazolium-based ionic liquid and bromide

Abstract

Keywords

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