USE OF CHLORINE ELECTROGENERATED FROM NaCl IN ACID MEDIUM AS A PROPOSAL FOR THE LEACHING OF ALLUVIAL GOLD

• Autores: Quiroz Aguinaga, Ulises, Baena Moncada, Angélica María, Toro Gómez, Adolfo La Rosa
• Formato: artículo
• Fecha de Publicación: 2021
• Institución: Sociedad Química del Perú
• Repositorio: Revista de la Sociedad Química del Perú
• Lenguaje: español
• OAI Identifier: oai:rsqp.revistas.sqperu.org.pe:article/313
• Enlace del recurso: http://revistas.sqperu.org.pe/index.php/revistasqperu/article/view/313
• Nivel de acceso: acceso abierto
• Materia: ecological leaching; chloride / hypochlorite; electrowinning; alluvial gold; lixiviación ecológica; cloruro/hipoclorito; electrolixiviación; oro aluvial

Anodic electrogeneration of molecular chlorine from sodium chloride in an electrolytic cell produces a hypochlorous acid solution in an aqueous medium. This mixture of chloride and hypochlorous was used to leach gold from alluvial ore to its complex forms, [AuCl2]-, [AuCl4]-. The optimal amounts of NaCl in a neutral medium for gold leaching was 10 g L-1, while at pH 2, with a fixed NaCl concentration of 10 g L-1 it was observed a gold leaching increment of 70.4%. The addition of sodium hypochlorite to a solution of sodium chloride at pH 2 shows that it is the chloride oxidized product that performs the function of oxidant and can be used successfully for gold recovering from alluvial ore without the use of mercury.