Application of solvent extraction for the separation of molybdenum from nano-crystaline cobalt electrodeposition effluents

M. Oliazadeh, R. T. Wu, J. H. Huang, A. M. Alfantazi

Research output: Contribution to conferencePaperpeer-review

Abstract

The present study was performed to develop a process for solvent extraction of molybdenum and cobalt from an acidic solution generated by an electrodeposition process of nanocrystalline cobalt alloys. Solvent extraction is a common practice in hydrometallurgical and refining processes to produce metals; however its application for separation of molybdenum and cobalt from this specific solution is new, because molybdenum and cobalt are not commonly associated together in nature. Five commercial organic extradants were examined for extraction of cobalt and molybdenum from synthetic acidic solutions with pH ranging from 1 to 5. Preliminary results showed that at pH 2, any of the Cyanex 923, Alamine 336, Aliquat 336 and Hostarex A327 could be used to extract 99% of molybdenum from solutions, while from pH 3 to 5, Aliquat 336 was able to extract about 100% of molybdenum. Cobalt extraction, on the other hand, varied from 15% to 23% at pH 3 and 30% to 53% at pH 2 using different extractants. Based on results obtained, Aliquat 336 was applied on mixed solutions of cobalt and molybdenum at various pHs. The results showed that molybdenum could be extracted as much as 99% from a mixture of molybdenum and cobalt at acidic pHs, while less than 1% of cobalt was separated at pH 2 to 4 simultaneously.

Original languageBritish English
Pages843-852
Number of pages10
StatePublished - 2003
EventHydrometallurgy 2003: Proceedings of the 5th International Symposium - Vancouver, BC, Canada
Duration: 24 Aug 200327 Aug 2003

Conference

ConferenceHydrometallurgy 2003: Proceedings of the 5th International Symposium
Country/TerritoryCanada
CityVancouver, BC
Period24/08/0327/08/03

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