Brazilian Journal of Chemical Engineering
On-line version ISSN 0104-6632
REMOVAL OF COPPER ELECTROLYTE CONTAMINANTS BY ADSORPTION. Braz. J. Chem. Eng. [online]. 1997, vol.14, n.3 ISSN 0104-6632. http://dx.doi.org/10.1590/S0104-66321997000300002.
Abstract - Selective adsorbents have become frequently used in industrial processes. Recent studies have shown the possibility of using adsorption to separate copper refinery electrolyte contaminants, with better results than those obtained with conventional techniques. During copper electrorefinning, many impurities may be found as dissolved metals present in the anode slime which forms on the electrode surface, accumulated in the electrolyte or incorporated into the refined copper on the cathode by deposition. In this study, synthetic zeolites, chelating resins and activated carbons were tested as adsorbents to select the best adsorbent performance, as well as the best operating temperature for the process. The experimental method applied was the finite bath, which consists in bringing the adsorbent into contact with a finite volume of electrolyte while controlling the temperature. The concentration of metals in the liquid phase was continuously monitored by atomic absorption spectrophotometry (AAS)
Keywords : Electrorefining; adsorption; copper.