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- Title
Insight into the Liquid–Liquid Extraction System Au Cl 4 − /HCl/A327H + Cl − Ionic Liquid/Toluene.
- Authors
Alguacil, Francisco J.; Lopez, Félix A.; Trucillo, Paolo; Lancia, Amedeo; Di Natale, Francesco
- Abstract
The ionic liquid A327H+Cl− 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 A327H+Cl− ionic liquid under various variables, including metal and ionic liquid concentrations, was investigated. Results indicate that A327H+Au Cl 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 Au Cl 4 − and H+. Gold (III) was stripped using thiocyanate media, and from the strip solutions, gold was precipitated as gold nanoparticles.
- Subjects
LIQUID-liquid extraction; IONIC strength; STABILITY constants; GOLD nanoparticles; TERTIARY amines; LIQUID metals; IONIC liquids
- Publication
Processes, 2021, Vol 9, Issue 4, p608
- ISSN
2227-9717
- Publication type
Article
- DOI
10.3390/pr9040608