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

Author(s)

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

• Document type: Journal article
• Source: INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING; v. 2018, p. 7-pg., 2018-01-01.

Abstract

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)

• FAPESP's process: 16/05527-5 - Separation of metals from sulfuric liquor of mining waste using chelating resins
• Grantee: Amilton Barbosa Botelho Junior
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 17/06563-8 - INFLUENCE OF REDUCING AGENT ON SULFURIC LIQUOR OF NICKEL LATERITE MINING IN THE ION EXCHANGE PROCESS USING CHELATING
• Grantee: Amilton Barbosa Botelho Junior
• Support Opportunities: Scholarships abroad - Research Internship - Master's degree
• FAPESP's process: 12/51871-9 - Study Center for Technology in Waste Solid Treatment and Recycling - SCTWSTR
• Grantee: Jorge Alberto Soares Tenório
• Support Opportunities: Research Projects - Thematic Grants