Kinetic study of chalcopyrite dissolution with iron(III) chloride in methanesulfonic acid
© 2018 The suitability of methanesulfonic acid as a copper lixiviant with ferric chloride as an oxidant was studied by analysing the leaching kinetics and by characterising solid residues from leach tests on a chalcopyrite-rich ore sample. The effects of temperature, initial acidity, ferric-ion conc...
| Main Authors: | , , , |
|---|---|
| Format: | Journal Article |
| Published: |
Elsevier
2018
|
| Online Access: | http://hdl.handle.net/20.500.11937/68602 |
| _version_ | 1848761844355825664 |
|---|---|
| author | Hidalgo, T. Kuhar, L. Beinlich, Andreas Putnis, Andrew |
| author_facet | Hidalgo, T. Kuhar, L. Beinlich, Andreas Putnis, Andrew |
| author_sort | Hidalgo, T. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2018 The suitability of methanesulfonic acid as a copper lixiviant with ferric chloride as an oxidant was studied by analysing the leaching kinetics and by characterising solid residues from leach tests on a chalcopyrite-rich ore sample. The effects of temperature, initial acidity, ferric-ion concentration and particle size were determined. The leach kinetics were dependent on the temperature and particle size, whereas the acid and ferric concentrations had a minimal impact on the leaching rate within the ranges studied. Although a sulfur layer formed on the solid residue, the reaction mechanism could be modeled with the shrinking-core model with surface chemical-reaction control, which implies that lixiviant flow through the sulfur layer did not control the reaction rate. The apparent activation energy was 101 kJ mol-1as calculated by the Arrhenius and 'time-to-a-given-fraction' methods. The activation parameters of the reaction were an enthalpy (?H++) of 99.4 kJ mol-1, and an entropy (?S++) of -197 J mol-1K-1as calculated by using transition state theory and the Eyring equation. |
| first_indexed | 2025-11-14T10:38:08Z |
| format | Journal Article |
| id | curtin-20.500.11937-68602 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:38:08Z |
| publishDate | 2018 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-686022018-06-29T12:35:01Z Kinetic study of chalcopyrite dissolution with iron(III) chloride in methanesulfonic acid Hidalgo, T. Kuhar, L. Beinlich, Andreas Putnis, Andrew © 2018 The suitability of methanesulfonic acid as a copper lixiviant with ferric chloride as an oxidant was studied by analysing the leaching kinetics and by characterising solid residues from leach tests on a chalcopyrite-rich ore sample. The effects of temperature, initial acidity, ferric-ion concentration and particle size were determined. The leach kinetics were dependent on the temperature and particle size, whereas the acid and ferric concentrations had a minimal impact on the leaching rate within the ranges studied. Although a sulfur layer formed on the solid residue, the reaction mechanism could be modeled with the shrinking-core model with surface chemical-reaction control, which implies that lixiviant flow through the sulfur layer did not control the reaction rate. The apparent activation energy was 101 kJ mol-1as calculated by the Arrhenius and 'time-to-a-given-fraction' methods. The activation parameters of the reaction were an enthalpy (?H++) of 99.4 kJ mol-1, and an entropy (?S++) of -197 J mol-1K-1as calculated by using transition state theory and the Eyring equation. 2018 Journal Article http://hdl.handle.net/20.500.11937/68602 10.1016/j.mineng.2018.05.025 Elsevier restricted |
| spellingShingle | Hidalgo, T. Kuhar, L. Beinlich, Andreas Putnis, Andrew Kinetic study of chalcopyrite dissolution with iron(III) chloride in methanesulfonic acid |
| title | Kinetic study of chalcopyrite dissolution with iron(III) chloride in methanesulfonic acid |
| title_full | Kinetic study of chalcopyrite dissolution with iron(III) chloride in methanesulfonic acid |
| title_fullStr | Kinetic study of chalcopyrite dissolution with iron(III) chloride in methanesulfonic acid |
| title_full_unstemmed | Kinetic study of chalcopyrite dissolution with iron(III) chloride in methanesulfonic acid |
| title_short | Kinetic study of chalcopyrite dissolution with iron(III) chloride in methanesulfonic acid |
| title_sort | kinetic study of chalcopyrite dissolution with iron(iii) chloride in methanesulfonic acid |
| url | http://hdl.handle.net/20.500.11937/68602 |