Extraction of Precious Metals with a New Amide Extractant

Abstract:

Precious metals are used widely in electronic industry because of their excellent heat resistance, corrosion resistance and catalytic property. Therefore it is important to recycle precious metals from E-waste. In this study, a new amid extractant N,N-Dimethyl-N,N-didecyl-3-thiopentanediamide (MDTDGA) was firstly synthesized through N-alkylated and N-acylation reaction. The extraction behavior of precious metals with MDTDGA in 80% dodecane-20% 2-ethylhexanol from hydrochloric acid was studied. The extraction ration increases with HCl concentration and extractant concentration, but it is not influenced by H⁺ concentration. It is indicated that the extraction of precious metals Pd (II), Pt (IV), Au (III) with MDTDGA is neutral coordination. High extraction efficiency of Au (III) of 99.5% using MDTDGA was obtained.

• Periodical: Advanced Materials Research (Volume 878)
• Pages: 399-405
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.878.399
• Online since: January 2014
• Authors: Ying Huang, Nan Li, Yong Hua Li, Jian Wu, Shang Hua Li, Sheng Chen, Lin Zhu
• Keywords: Amide Extractant, Precious Metal, Solvent Extraction, Synthesis

References

[1] H. KiKuchi, Y. Eto. Janpan. Patent. JP06136465A2. (Nissan Moter, 1994).

[2] T. Kakoi, M. Goto and F. Nakashio, Solvent Extraction of Palladium with Bis(2, 4, 4-Trimethylpentyl)dithiophosphinic Acid and Bis(2, 4, 4-Trimethylpentyl)Monot-lliophosphinic Acid, Solv. Extr. Ion Exch. 12(1994), 541-555.

DOI: 10.1080/07366299408918223

[3] M. Rovia, J. L. Cortina and A. M. Sastre, Selective Liquid-liquid Extraction of Palladium(Ⅱ) from Hydrochloric Acid Media by Di-(2-ethylhexyl)Thiophosphoric Acid. Solv. Extr. Ion Exch. 17(1999), 333-349.

DOI: 10.1080/07366299908934616

[4] Y. Hasegawa, I. Kobayashi and S. Yoshimoto, Extraction of palladium(Ⅱ) and platinum(Ⅳ)as chlorocomplex acids into basic organic solvents, Solv. Extr. Ion Exch. 9(199l), 759-768.

DOI: 10.1080/07366299108918083

[5] Y. Baba, K. Inoue, K Yoshizuka, et a1., Solvent Extraction of Palladium(Ⅱ)with Nonchelating Oxime with Different Alkyl China Lengths, Ind. Eng. Chem. Res., 29(1990), 211l-2118.

DOI: 10.1021/ie00106a021

[6] G. M. Ritcey, A. W. Ashbrook, Solvent Extraction, Principles and Applications to Process Metallurgy, Part I, Elsevier, (1984).

[7] Michael Cox, Principles and Practices of Solvent Extraction, New York, Marcell Dekker, (1992).

[8] J. Shibata, A. Okuda, Recycling Technology of Precious Metals, MMIJ ( Shigen-to-Sozai), 118(2002), 1-8.

DOI: 10.2473/shigentosozai.118.1

[9] T. N. Lokhande, M. A. Anuse, M. B. Chavan, Liquid-liquid extraction of palladium(Ⅱ) with N-n-octylaniline from hydrochloric acid media, Talanta 46(1998), 163-169.

DOI: 10.1016/s0039-9140(97)00270-1

[10] I. Szczepanska, A. Borowiak-Resterna, M. Wisniewski, New pyridinecarboxamides for rapid extraction of palladium from acidic chloride media, Hydrometallurgy, 68(2003), 159-170.

DOI: 10.1016/s0304-386x(02)00201-3

[11] M. Wisniewski, Palladium(Ⅱ) extraction by pyridine carboxylic acid esters, J. Radioanal. Nucl. Chem. 256(2000), 693-696.

[12] A. Uheida, Y. Zhang, M. Muhammed, Selective extraction of palladium(Ⅱ) from chloridesolutions with nonylthiourea dissolved in chloroform, Solv. Extr. Ion. Exch. 20(2002), 717-733.

DOI: 10.1081/sei-120016075

[13] Ai Bazi S J，H. Freiser, Mechanistic studies on the extraction of palladium(II) with dioctyl sulfide, Solvent Extr. Ion Exch. 5(1987), 265-275.

DOI: 10.1080/07366298708918566

[14] G. H. Rizvi，J. N. Mathur, M. S. Murall, et a1., Recovery of fission product palladium from acidic high level waste solutions, Separation Science and Technology, 31(1996), 1805-1816.

DOI: 10.1080/01496399608001011

[15] H. Narita, M. Tanaka, K. Morisaku, T. Abe, Extraction of gold(III) in hydrochloric acid solution using monoamide compounds, Hydrometallurgy 81(2006), 153-158.

DOI: 10.1016/j.hydromet.2005.10.008

[16] H. Narita, M. Tanaka, et al. Rapid separation of Palladium (II) from Patinum (IV) in hydrochiloric acid solution with thiodiglycolamide, Chemistry letters, 33(2004), 1144-1145.

DOI: 10.1246/cl.2004.1144

[17] H. Narita, M. Tanaka, et al. Palladium extraction with N, N, N'N'-tetra-n-octyl- thiodiglycolamide, Minerals engineering, 21(2008), 483-488.

DOI: 10.1016/j.mineng.2008.01.011

[18] D. H. Williams, L. Fleming, Spectroscopic methods in organic chemistry, Third edition, New York, McGGAW-HILL Book Company (UK) limited, (1980).

[19] H. Narita, M. Tanaka, et al., Structural effect of monoamide compounds on the extraction of gold, Solvent Extraction Research and development, 12(2005), 123-130 (in Japanese).

[20] Y. Jianmin, Solvent Extraction Chemistry of Precious Metals, Chemistry Industry Press, 2010 (In Chinese).