Abstract
Abstract A study has been made on the recovery & separation of cobalt and copper from organic acid leaching solution by solventextraction. The experimental parameters such as the equilibrium pH, concentration of extractant and phase ratio were observed.Copper was extracted using LIX 84 and Cobalt was extracted using cyanex 272 and versatic acid 10. Experimental resultsshowed that extraction percent of copper was 99% at above eq. pH 2.0 and then more than 90% of cobalt were extracted bycyanex 272 in eq. pH 6.0 and versatic acid 10 in eq. pH 7.5. Stripping of copper and cobalt from the loaded organic phases canbe accomplished by sulfuric acid as a stripping reagent and 120 ~ 150 g/L of H 2 SO 4 was effective for the stripping of copperand cobalt respectively. Finially, the basic optimal process for recovery of copper and cobalt from the bio-leaching solution wasproposed. Key words : Solvent extraction, Copper, Cobalt, Separation, Organic acid · Received : December 26, 2014 · Revised : February 28, 2015 · Accepted : March 23, 2015Corresponding Author : Jae Woo Ahn (E-mail : jwahn@daejin.ac.kr)Advanced Materials Science & Engineering, Daejin University, Hoguk-ro 1007, Pocheon-si, Gyeonggi-do, 487-711, Korea ⓒThe Korean Institute of Resources Recycling. All rights reserved. This is an open-access article distributed under the termsof the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permitsunrestricted non-commercial use, distribution and reproduction in any medium, provided the original work is properly cited.
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