What is it about?

Extraction/separation of cobalt by solvent extraction has been reviewed. Separation of cobalt using various reagents and cobalt recovery from scrap using commercial extractant has been analyzed. The total review indicates the separation ability for cobalt follow the order phosphinic > phosphonic > phosphoric acid due to the increasing stabilization of tetrahedral coordination compound of cobalt with the extractant in the organic phase. Depending upon solution composition mainly the commercial extractants like Cyanex 272, D2EPHA and PC 88A should be primarily used for commercial extraction processes and efficient management of their combination can address various separation issues associated with cobalt bearing scrap.

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Why is it important?

Separation/purification of Cobalt by solvent extraction using commercial extractant is no more a challenge after decades of research in the field. Several commercial cobalt recovery hydrometallurgy plants are now operational. Cheaper and efficient commercial extractants like Cyanex, D2EPHA and PC 88A or its synonymous reagents are added in a sophisticated matter for scrap recycling. Recycling of Cobalt bearing scrap through solvent extraction can be commercially feasible and environmentally friendly process.

Perspectives

Separation/purification of Cobalt by solvent extraction using commercial extractant is no more a challenge after decades of research in the field. Several commercial cobalt recovery hydrometallurgy plants are now operational. Cheaper and efficient commercial extractants like Cyanex, D2EPHA and PC 88A or its synonymous reagents are added in a sophisticated matter for scrap recycling. Recycling of Cobalt bearing scrap through solvent extraction can be commercially feasible and environmentally friendly process.

Dr Basudev Swain
Institute for Advanced Engineering (IAE)

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This page is a summary of: Extraction/Separation of Cobalt by Solvent Extraction: A Review, Applied Chemistry for Engineering, December 2015, The Korean Society of Industrial and Engineering Chemistry,
DOI: 10.14478/ace.2015.1120.
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