Insight into the liquid-liquid extraction system AuCl- 4 /HCl/A327H+Cl- ionic liquid/toluene
The ionic liquid A327HCl is generated by reaction of the tertiary amine A327 (industrial mixture of tri-octyl and tri-decyl amines) and hydrochloric acid solutions. In this study, the extraction of Au(III) by A327HCl ionic liquid under various variables, including metal and ionic liquid concentratio...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/258084 |
| Acceso en línea: | http://hdl.handle.net/10261/258084 |
| Access Level: | acceso abierto |
| Palabra clave: | Gold(III) A327H+Cl− Liquid-liquid extraction Ionic liquids Nanoparticles |
| Sumario: | The ionic liquid A327HCl is generated by reaction of the tertiary amine A327 (industrial mixture of tri-octyl and tri-decyl amines) and hydrochloric acid solutions. In this study, the extraction of Au(III) by A327HCl ionic liquid under various variables, including metal and ionic liquid concentrations, was investigated. Results indicate that A327HAuCl-4 is formed by an exothermic (ΔH° = -3 kJ/mol) reaction in the organic solution. Aqueous ionic strength influences the formation constant values, and the specific interaction theory (SIT) was used to estimate the interaction coefficient between AuCl-4 and H. Gold (III) was stripped using thiocyanate media, and from the strip solutions, gold was precipitated as gold nanoparticles. |
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