| Texto completo | |
| Autor(es): |
Gomes, Nayara
;
Garjulli, Franco
;
Botelho Junior, Amilton Barbosa
;
Espinosa, Denise Crocce Romano
;
Baltazar, Marcela dos Passos Galluzzi
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOM; v. 76, n. 3, p. 11-pg., 2023-11-22. |
| Resumo | |
Nickel catalysts are widely applied in the chemical and petrochemical industry due to high catalytic activity and low cost. However, these catalysts are often irreversibly deactivated, leading to residue generation. For this reason, recycling is necessary to reduce the environmental impact of landfills and to obtain valuable metal from the secondary source. Hydrometallurgical recycling routes have been investigated to provide nickel from secondary sources. A catalyst from the petrochemical process contained 44.5% Ni and was calcined at 600 degrees C for 3 h to remove organic compounds. Then, the material was ground, and leaching experiments were performed using H2SO4. The effects of temperature, concentration, solid-liquid ratio, particle size, and time were evaluated. The best leaching conditions were 100 degrees C, 2 mol/L H2SO4, solid-liquid ratio 1/5, d50 8.5 mu m in 8 h with 97.4% of nickel leaching (116 g/L). The leach solution was purified using chelating ion exchange resins. Three resins were studied with different functional groups: iminodiacetate, HPPA, and aminophosphonic. The effect of pH in the batch and removing contaminants in a continuous system were evaluated. Iron removal achieved 92.2% efficiency using aminophosphonic resin in a continuous process using four columns. The recovery of nickel in the process reached 94.3%. (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: | 12/51871-9 - Estudo de novas tecnologias e rotas de processamento para o tratamento e reciclagem de resíduos sólidos |
| Beneficiário: | Jorge Alberto Soares Tenório |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| 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 |