Materials Transactions Online

Materials Transactions, Vol.58 No.02 (2017) pp.287-290
© 2017 The Japan Institute of Metals and Materials

Separation of Silver (I) and Zinc(II) from Nitrate Solutions by Solvent Extraction with LIX63

Pan-Pan Sun1, Byoung-Jun Min1, Sung-Tae Kim1 and Sung-Yong Cho1

1Department of Environment and Energy Engineering, Chonnam National University, Gwangju 61186, Republic of Korea

The separation of Ag(I) and Zn(II) from nitrate solutions using 5,8-diethyl-7-hydroxy-dodecan-6-oxime (LIX63) as the extractant was investigated as a function of nitric acid (HNO3) and extractant concentrations. Selective extraction of Ag(I) over Zn(II) was achieved with LIX63 when HNO3 concentration was in the range 0.001-1 mol/dm3. Quantitative stripping of Ag(I) from loaded LIX63 was accomplished using 5 mol/dm3 of HNO3. The McCabe-Thiele diagrams for the extraction and stripping of Ag(I) with LIX63 were constructed, and the results were verified by simulated cross-current extraction and stripping experiments. Finally, Ag(I) and Zn(II) solutions of high purity (> 99.95%) were obtained.

[doi:10.2320/matertrans.M2016316]

(Received 2016/09/08; Accepted 2016/11/28; Published 2017/01/25)

Keywords: silver, zinc, nitric acid, separation, extraction

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