| Texto completo | |
| Autor(es): |
dos Santos, Luis Henrique do Nascimento
;
Pereira, Barbara da Rocha
;
Rosset, Morgana
;
Espinosa, Denise Crocce Romano
;
Botelho Junior, Amilton Barbosa
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | MINERALS ENGINEERING; v. 217, p. 11-pg., 2024-08-25. |
| Resumo | |
Growing demand for high-purity Al2O3 for the electronic market and green energy production, allied with the need to decrease waste generation and dam use, will impact the future of mining, and new processes should be developed. The present study aimed to develop a hydrometallurgical process to obtain high-purity Al2O3 from bauxite. Among the samples studied, BX03 had the highest Al2O3 (63.8 %) and lowest Fe2O3 content (4.3 %). Different acids were evaluated - H2SO4, HCl, HNO3, and H3PO4 - and the H2SO4 reaction achieved all Al leaching with the best technical-economic analysis (TEA). Purification experiments were carried out with ion exchange resins in batch reactions. The best purification parameters were 4 h of contacting time and mass of resin/volume of solution ratio as 1/10 at 45 degrees C in two stages. The iminodiacetate resin (Lewatit TP 207) achieved the best results and removed all Fe ions without losses. High-purity Al2O3 was further obtained by precipitation with NH4OH after calcination. Considering the leaching step costs, the proposed process may achieve up to US$ 63,022.91 in profit. (AU) | |
| Processo FAPESP: | 21/14842-0 - Elucidação do mecanismo de complexação de organometálicos entre extratantes orgânicos e elementos terras raras |
| Beneficiário: | Amilton Barbosa Botelho Junior |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 19/11866-5 - Desenvolvimento de processos inovadores para recuperação de metais críticos |
| Beneficiário: | Denise Crocce Romano Espinosa |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 23/01032-5 - Separação de metais críticos através de membranas suportadas com líquidos: avaliação da interação sinérgica entre organofosforados e membranas |
| Beneficiário: | Amilton Barbosa Botelho Junior |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado |