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Solvent Extraction of Gold(I) Directly from Alkaline Cyanide Solution with Dibutyl Sulfoxide and n-Octanol

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Abstract

The direct extraction of gold from alkaline cyanide solution with dibutyl sulfoxide and n-octanol diluted in kerosene was investigated. It has been indicated that the gold extraction percentage increases by increasing dibutyl sulfoxide concentration, n-octanol concentration, and organic-to-aqueous (O/A) phase ratio, but decreases with the increase of initial gold concentration and equilibrium pH of the aqueous phase. No gold extraction was observed using n-octanol alone as an extractant, but n-octanol had an obvious synergistic effect on gold extraction with dibutyl sulfoxide. The extraction reaction was rapid for the extraction equilibrium and could be established within 3 minutes. Gold loaded in the organic phase could be stripped effectively by Na2S2O3 solution. It was indicated that at Na2S2O3 concentration 0.12 mol·L−3, aqueous-to-organic (A/O) phase ratio 1.0, and retention time of 5 minutes, the gold stripping percentage reached 92.6 pct.

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Acknowledgments

This study was financed for the Nature Science Project No. KJ2008B181 by the Advanced Education Agency of Anhui Province of China. The authors are grateful for the support.

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Authors and Affiliations

  1. Department of Chemistry and Chemical Engineering, Huainan Normal University, Anhui, Huainan, 232001, P.R. China

    Lu Pan (Ph.D Student), Fengwu Wang (Professor) & Xia Bao (Professor)

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  1. Lu Pan
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  2. Fengwu Wang
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  3. Xia Bao
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Corresponding author

Correspondence to Xia Bao.

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Manuscript submitted August 9, 2008.

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Pan, L., Wang, F. & Bao, X. Solvent Extraction of Gold(I) Directly from Alkaline Cyanide Solution with Dibutyl Sulfoxide and n-Octanol. Metall Mater Trans B 40, 457–461 (2009). https://doi.org/10.1007/s11663-009-9253-z

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  • DOI: https://doi.org/10.1007/s11663-009-9253-z

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