Alkane-α,ω-diyl bis(0,0-dialkylphosphonate)s as extractants for gold in hydrochloric acid medium

Authors

  • Concepcion S. Mendoza Chemistry Department, University of San Carlos, Cebu City
  • Satsuo Kamata Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Kagoshima University, Korimoto, Kagoshima City

DOI:

https://doi.org/10.26534/kimika.v18i1.13-18

Keywords:

alkane-α, ω-diyl bis(0, 0-dialkylphosphonate)s, gold extraction, hydrochloric medium, solvent extraction

Abstract

This study describes the alkane-a, m-diyl bis(O,O-dialkylphosphonate)s as potential reagents for solvent extraction of Au(III) and some other metal ions from chloride medium. The Au(III) selectivity can be improved to a practicable viability by an appropriate selection of the bis-phosphonate structure; The alkane-α,ω-diyl bis(0,0-dialkylphosphonate)s possesses extraction properties ideal for its use in the solvent extraction of Au(III) from hydrochloric acid medium. Au(III) extraction by this reagent proceeds through formation of a 1:1 metal-ligand complex, typical of a organophosphorus solvating extractant. The extraction, selectivity, stripping, and kinetic data suggest that methane-1,1-diyl bis(0,0-dialkylphosphonate) is a highly promising reagent for the commercial recovery of Au(III) from HCl leach sources and can be recommended for pilot-plant trials, using thiourea as the stripping agent.

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How to Cite

Mendoza, C. S., & Kamata, S. (2002). Alkane-α,ω-diyl bis(0,0-dialkylphosphonate)s as extractants for gold in hydrochloric acid medium. KIMIKA, 18(1), 13–18. https://doi.org/10.26534/kimika.v18i1.13-18

Issue

Vol. 18 No. 1 (2002)

Section

Research Articles

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