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Metals 2017, 7(10), 439; https://doi.org/10.3390/met7100439

Application of Co and Mn for a Co-Mn-Br or Co-Mn-C2H3O2 Petroleum Liquid Catalyst from the Cathode Material of Spent Lithium Ion Batteries by a Hydrometallurgical Route

1
Resources Recovery Research Center, Korea Institute of Geoscience & Mineral Resources, Daejeon 305-350, Korea
2
Department of Metallurgical Engineering, Pukyong National University, Busan 608-739, Korea
*
Author to whom correspondence should be addressed.
Received: 30 August 2017 / Revised: 29 September 2017 / Accepted: 11 October 2017 / Published: 18 October 2017
(This article belongs to the Special Issue Valuable Metal Recycling)
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Abstract

We investigated the preparation of CMB (cobalt-manganese-bromide) and CMA (cobalt-manganese-acetate) liquid catalysts as petroleum liquid catalysts by simultaneously recovering Co and Mn from spent Li-ion battery cathode material. To prepare the liquid catalysts, the total preparation process for the liquid catalysts consisted of physical pre-treatments, such as grinding and sieving, and chemical processes, such as leaching, solvent extraction, and stripping. In the physical pre-treatment process, over 99% of Al was removed from material with a size of less than 0.42 mm. In the chemical process, the leaching solution as obtained under the following conditions: 2 mol/L sulfuric acid, 10 vol % H2O2, 0.1 of solid/liquid ratio, and 60 °C. In the solvent extraction process, the optimum concentration of bis (2,4,4-trimethylpentyl) phosphinic acid (Cyanex 272), the equilibrium pH, the degree of saponification, the organic phase/aqueous phase ratio isotherm, and the stripping study for the extraction of Co and Mn were investigated. As a result, Co and Mn were recovered by 0.85 M Cyanex 272 with 50% saponification in counter current two extraction stages. Finally, a CMB and CMA liquid catalyst containing 33.1 g/L Co, 29.8 g/L Mn, and 168 g/L Br and 12.67 g/L Co, 12.0 g/L Mn, and 511 g/L C2H3O2, respectively, was produced by 2 M hydrogen bromide and 50 vol % acetic acid; it was also found that a shortage in the concentration can be compensated with cobalt and manganese salts. View Full-Text
Keywords: CMB; CMA; cobalt; manganese; Li-ion battery CMB; CMA; cobalt; manganese; Li-ion battery
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Joo, S.-H.; Shin, D.J.; Oh, C.H.; Wang, J.-P.; Park, J.T.; Shin, S.M. Application of Co and Mn for a Co-Mn-Br or Co-Mn-C2H3O2 Petroleum Liquid Catalyst from the Cathode Material of Spent Lithium Ion Batteries by a Hydrometallurgical Route. Metals 2017, 7, 439.

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