Extraction of cobalt and lithium from waste lithium ion batteries of mobile phones

Park, Hong Ki (2011) Extraction of cobalt and lithium from waste lithium ion batteries of mobile phones. Masters thesis, Korea Maritime University, South Korea.

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As the life of electronic products is reducing due to development of new technologies, it resulted in the tremendous generation of waste equipments and associated components like lithium ion battery which contains valuable metals Li and Co. Recycling of these waste batteries is essential in order to save natural resources and prevent the environment from being contaminated. The process parameter for the recovery of Li and Co was optimized experimentally varying the concentration of leachant, pulp density, reductant volume and temperature. 2M sulfuric acid with 10 volume % of hydrogen peroxide and pulp density of 100 g/L resulted in a highly efficient recovery of almost 97.9% Li and 97.9% Co in 60 min at 75°C. Hydrogen peroxide in sulfuric acid solution acts as an effective reducing agent because it enhances the leaching efficiency. Leaching kinetics of Li and Co in sulfuric acid studied is a chemically controlled reaction having equation 1-(1-X) 1/3 = Kct. When condition was optimized, result was used for the separation of cobalt and lithium from leach liquor (two times diluted) having composition 15.19 g/L cobalt and 2.02 g/L lithium using Cyanex272. From pure metal solution metal/ metal salt could be prepared using electro-winning /evaporation process.

Item Type:Thesis (Masters)
Official URL/DOI:http://eprints.nmlindia.org/5529
Supervisor(s):Jha, Manis K
Uncontrolled Keywords:Leaching, solvent extraction.
Divisions:Metal Extraction and Forming
ID Code:5529
Deposited On:25 Jun 2012 14:09
Last Modified:20 Sep 2012 09:56
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