Chiara Bonomi, Alexandra Alexandri
In this study, bauxite residue was directly leached using the Brønsted acidic ionic liquid 1-ethyl-3-methylimidazolium hydrogensulfate. Stirring rate, retention time, temperature, and pull density have been studied in detail as the parameters that affect the leaching process. Their optimized combination has shown high recovery yields of Sc, nearly 80%, and Ti (90%), almost total dissolution of Fe, while Al and Na were partially extracted in the range of 30–40%. Si and rare earth element (REEs) dissolutions were found to be negligible, whereas Ca was dissolved and precipitated as CaSO4. The solid residue after leaching was fully characterized, providing explanations for the destiny of REEs that remain undissolved during the leaching process. The solid residue produced after dissolution can be further treated to extract REEs, while the leachate can be subjected to metal recovery processes (i.e., liquid–liquid extraction) to extract metals and regenerate ionic liquid.
@article{8589b59d-beaf-4a0f-a4fa-eb491730ea09,
title={2018 Bonomi Ionic liquid leaching of bauxite residue},
author={Chiara Bonomi and Alexandra Alexandri},
year={2026},
language={en}
}TY - JOUR TI - 2018 Bonomi Ionic liquid leaching of bauxite residue AU - Chiara Bonomi AU - Alexandra Alexandri PY - 2026 LA - en ER -
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