Pre-Reducing Process Kinetics to Recover Metals from Nickel Leach Waste Using Chelating Resins

Autor(es)

Botelho Junior, Amilton Barbosa ; Dreisinger, David Bruce ; Romano Espinosa, Denise Crocce ; Soares Tenorio, Jorge Alberto

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING; v. 2018, p. 7-pg., 2018-01-01.

Resumo

The main problem of the separation process from nickel mining using the ion exchange technique is the presence of iron, which precipitates in pH above 2.00 and causes coprccipitation of copper and cobalt. Chelating resins have the main advantage of being selected for a specific metal present in solution. Studies have been developed to increase the efficiency of metals recovery using chemical reduction and the ion exchange process to recover metals. The aim of this work was to use sodium sulfite as a reducing agent to convert Fe(III) to Fe(II). Chelating resins Lewatit (R) TP 207, selective for copper, and Lewatit (R) TP 220, selective for nickel and cobalt, were studied. Batch experiments were performed to study the effect of pH with and without sodium sulfite. Results indicated that the industrial process has increased efficiency when the reducing process is applied. (AU)

• Processo FAPESP: 16/05527-5 - Separação de metais a partir de líquor sulfúrico de resíduo de mineração utilizando resinas quelantes
• Beneficiário: Amilton Barbosa Botelho Junior
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 17/06563-8 - Influência do agente redutor no liquor sulfúrico de resíduo de mineração no processo de troca-iônica utilizando resina quelante
• Beneficiário: Amilton Barbosa Botelho Junior
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Mestrado
• 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