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Open AccessFeature PaperArticle

Hydrometallurgical Recovery of Cobalt(II) from Spent Industrial Catalysts

1
Institute of Chemical Technology and Engineering, Poznan University of Technology, ul. Berdychowo 4, 60-965 Poznań, Poland
2
Department of Commodity Science and Ecology of Industrial Products, Faculty of Commodity Science, Poznań University of Economics and Business, Al. Niepodległości 10, 61-875 Poznań, Poland
*
Author to whom correspondence should be addressed.
Catalysts 2020, 10(1), 61; https://doi.org/10.3390/catal10010061
Received: 2 December 2019 / Revised: 23 December 2019 / Accepted: 30 December 2019 / Published: 1 January 2020
(This article belongs to the Special Issue Recent Advances Utilized in the Recycling of Catalysts)
The work presents studies on the application of hydrometallurgical recovery of cobalt(II) from solutions after leaching spent industrial catalysts used in process of hydrodesulfurization. A four-stage process was proposed, which consists of: leaching, precipitation of metal hydroxides accompanying Co(II), extraction of Co(II) with bis(2,4,4-trimethylpentyl)phosphinic acid and Co(II) stripping from the organic phase. The results indicate that by using the proposed method it is possible to leach Co(II) and Mo(VI) from spent catalyst, and remove main impurities such as Al(III), Fe(III) in hydroxide precipitation step and separate Co(II) from Mo(VI) by extraction and stripping. View Full-Text
Keywords: spent catalyst; cobalt recovery; hydrodesulfurization catalyst; leaching; hydrometallurgy; liquid-liquid extraction; Cyanex 272 spent catalyst; cobalt recovery; hydrodesulfurization catalyst; leaching; hydrometallurgy; liquid-liquid extraction; Cyanex 272
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MDPI and ACS Style

Wiecka, Z.; Rzelewska-Piekut, M.; Cierpiszewski, R.; Staszak, K.; Regel-Rosocka, M. Hydrometallurgical Recovery of Cobalt(II) from Spent Industrial Catalysts. Catalysts 2020, 10, 61.

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