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http://dx.doi.org/10.7844/kirr.2011.20.6.078

Behavior of Cobalt Extraction from Cobalt Sulphate solution using Supercritical 2  

Shin, Shun-Myung (Mineral Resources Research Division, Korea Institute of Geoscience & Mineral Resources (KIGAM))
Joo, Sung-Ho (Mineral Resources Research Division, Korea Institute of Geoscience & Mineral Resources (KIGAM))
Sohn, Jeong-Soo (Mineral Resources Research Division, Korea Institute of Geoscience & Mineral Resources (KIGAM))
Kang, Jin-Gu (Mineral Resources Research Division, Korea Institute of Geoscience & Mineral Resources (KIGAM))
Publication Information
Resources Recycling / v.20, no.6, 2011 , pp. 78-82 More about this Journal
Abstract
Supercritical $CO_2$($scCO_2$) extraction has a great possibility to be a new process to recover metal and to replace the existing leaching/solvent extraction processes. The cobalt extraction was carried out using $scCO_2$ from cobalt sulphate solution. The bis (2,4,4-trimethylpentyl) phosphinic acid and diethylamine ligands were used to extract cobalt ion in $scCO_2$. The recommended method consists of $scCO_2$/extractants complexation process and metal extraction process at 60, 200bar. Experimental results showed that the extraction efficiency of Co was increased by 16-99% with increasing the ligand amount.
Keywords
Supercritical 2(scCO2); cobalt sulphate solution; Cyanex 272; DEA; cobalt;
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