The use of computational thermodynamic for yttrium recovery from rare earth elements-bearing residue

Autor(es)

Botelho Junior, Amilton Barbosa ^[1] ; Espinosa, Denise Crocce Romano ^[1] ; Tenorio, Jorge Alberto Soares ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Polytech Sch, Dept Chem Engn, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF RARE EARTHS; v. 39, n. 2, p. 201-207, FEB 2021.
• Citações Web of Science: 3

Resumo

The rare earth elements are considered critical metals, due to the risk of supply interruption. The recycling of waste electrical and electronic equipment can be an alternative to supply the rare earth market. Several processes have been developed, and by aqueous media is the most prominent, which makes possible the extraction and separation of elements even in low concentration (traces). As an example of thermal processing, the use of thermodynamic simulations might benefit the metal extraction in hydrometallurgical processing. For this reason, the goal of this work is to evaluate the use of FactSage 7.2 software for the leaching of fluorescent lamp powders by sulfuric acid. The effect of concentration and temperature was evaluated. Results comprise that the thermodynamic software wellpredicted the solid phase formed in all residues of leaching experiments gypsum was predicted by the software and identified in oanalyses. It demonstrates that FactSage software can be explored for metals extraction in aqueous media, being important for trace-elements extraction. Yttrium extraction reaches up to 95% at 45 degrees C using H2SO4 2 mol/L. (c) 2020 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 18/11417-3 - Obtenção de escândio a partir de resíduo de bauxita lama vermelha utilizando processo de lixiviação em meio ácido
• Beneficiário: Jorge Alberto Soares Tenório
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/03483-6 - Estudo cinético e termodinâmico da recuperação de escândio da lama vermelha brasileira utilizando técnicas hidrometalúrgicas
• Beneficiário: Amilton Barbosa Botelho Junior
• Modalidade de apoio: Bolsas no Brasil - Doutorado