Kafumbila Kasonta Joseph
It has been known for over thirty years that the extractant D2EHPA is effective for separating cobalt and manganese. Unfortunately, D2EHPA extracts calcium to the same extent as manganese. Consequently, in industrial practice, when D2EHPA is used to separate manganese and cobalt in the presence of calcium, stripping is performed using hydrochloric acid to prevent gypsum precipitation. Pilot plant results have shown that when stripping D2EHPA containing calcium with sulfuric acid, gypsum precipitates at the bottom of the settler without forming 'crud'. Using our D2EHPA extractant simulator and the Realistic Simulation Program, it is now possible to simulate gypsum precipitation within the scrubbing section, enhancing the understanding of the separation process and its limitations. This study provides insights into optimizing the solvent extraction process for manganese removal and suggests methodologies to address the issue of gypsum formation, ultimately contributing to more effective chemical engineering practices in hydrometallurgy.
@article{6d4707fe-e74e-40e5-b44a-a30bff52d1fc,
title={Design of Manganese removal circuit in the Cobalt bleeding solution by solvent extraction with D2EHPA : Kinetic limitations},
author={Kafumbila Kasonta Joseph},
year={2026},
language={en}
}TY - JOUR TI - Design of Manganese removal circuit in the Cobalt bleeding solution by solvent extraction with D2EHPA : Kinetic limitations AU - Kafumbila Kasonta Joseph PY - 2026 LA - en ER -
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