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Nitric acid leaching of electronic scraps and the removal of free nitric acid from the leaching solution for the recovery of copper and tin.  

Ahn, Jae-Woo (Dept. of Advanced Materials Sci. & Eng., Daejin University)
Seo, Jae-Seong (Dept. of Advanced Materials Sci. & Eng., Daejin University)
Publication Information
Resources Recycling / v.18, no.5, 2009 , pp. 44-51 More about this Journal
Abstract
Fundamental study has been made on the recovery of copper from the electronic scrap by hydrometallurgical process. Nitric acid was used as a leaching agent to dissolve the metals such as Cu, Sn, Pb, Fe etc. from the crushed electronic scraps. TBP was employed to extract nitric acid from the strong nitric acid leaching solutions and to reclaim nitric acid. From the experimental results, Cu was effectively leached by 3.0-4.0 M nitric acid. And 95% of nitric acid in the leaching solution was extracted by 60% TBP, and 98% of nitric acid was stripped from the loaded organic phase by distilled water and it was possible to reuse as a leaching agent.
Keywords
Electronic scrap; nitric acid leaching; solvent extraction; recovery; Copper; tin;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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