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Experimental study of phase entrainment in copper solvent extraction
Estudio experimental de atrapamiento de fases en extracción por solventes de cobre
DOI:
https://doi.org/10.15446/dyna.v87n213.84413Palabras clave:
phase entrainment, solvent extraction, drop diameter, dispersion (en)atrapamiento de fases, extracción por solventes, diámetro de gotas, dispersión (es)
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The entrainment of the organic phase in the aqueous applied to typical solutions in a solvent extraction of copper process was studied. The organic phase used is composed of the commercial extractant LIX 984-N diluted in Shellsol 2046 AR. The aqueous phase contains 6 g/L of Cu2+, at pH 2 and 20 ºC. The variables studied were: mixing speed of 400 to 1000 rpm; mixing time of 3 to 30 minutes; initial pH of the electrolyte 2, 3, and 4; percentage of extractant in the organic phase 10 to 30% v/v; and copper concentration in the aqueous phase 1 to 6 g/L. It was determined that the entrainment of the organic phase in the aqueous is determined by the physical properties of the phases in equilibrium and by the system’s hydrodynamics, and it is a phenomenon that involves the advancing speed of the interphase (or dispersion band) and the displacement speed of the organic drops.
Se estudió el atrapamiento de fase orgánica en acuoso aplicado a soluciones típicas de un proceso de extracción por solventes de cobre. La fase orgánica empleada está compuesta por el extractante comercial LIX 984-N diluido en Shellsol 2046 AR. La fase acuosa contiene 6 g/L de Cu2+, pH 2 a 20 ºC. Las variables estudiadas fueron: velocidad de mezclamiento de 400 a 1000 rpm, tiempo de mezclado de 3 a 30 minutos, pH inicial del electrolito de 2, 3 y 4, porcentaje de extractante en fase orgánica de 10 a 30% v/v y concentración de cobre en fase acuosa de 1 a 6 g/L. Se determinó que el atrapamiento de fase orgánica en acuoso está determinado por las propiedades físicas de las fases en equilibrio y por la hidrodinámica del sistema, siendo un fenómeno que involucra a la velocidad de avance de la interfase (o banda de dispersión) y la velocidad de desplazamiento de las gotas de orgánico.
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1. Katia Vutova, Vladislava Stefanova, Vania Vassileva, Milen Kadiyski. (2022). Behaviour of Impurities during Electron Beam Melting of Copper Technogenic Material. Materials, 15(3), p.936. https://doi.org/10.3390/ma15030936.
2. J. Aguirre Solano, Sanja Mišković. (2024). Process intensification of metal solvent extraction studies using a miniaturized solvent extraction plant. Chemical Engineering and Processing - Process Intensification, 199, p.109737. https://doi.org/10.1016/j.cep.2024.109737.
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