Synthesis and Characterization of New Kinds Sulfoxide Extractants for Palladium(II)

Abstract:

Three new extractants for palladium(II) extraction: bis(noctyl-Sulfinyl-ethyl) ether(L₁), bis(isooctyl-Sulfinyl-ethyl)ether(L₂), bis(isooctyl-Sulfinyl-ethoxy)ethane(L₃) were synthesized. Micro-analytical data, elemental analysis, ¹HNMR and IR-spectra were used to confirm the structures. Based on independent extraction experiments of Pd(II) , the extraction parameters of Pd(II) were studied in detail, and the optimal extraction parameters were obtained and summarized as the following: H+ concentration of aqueous phase 1.0-1.5 mo1·L^-1, sulfoxide extractants concentration 0.01-0.1 mo1·L^-1. The order of the extractability of the three extractants towards palladium(II) was L₂>L₃>L₁. The coordination number was studied by the slope method. The results indicated that, in low acidity, the coordination number for extracting palladium (II) was 1.0 with all three extractants, while it was 2.0 in high acidity. FT-IR spectra was used to analyze the structure of the complex. Palladium (II) was coordinated with the oxygen atom in S=O group of the three extractants. and palladium (II) may also coordinated with the oxygen atom in C-O-C group of extractant L₁, L₂.

• Periodical: Advanced Materials Research (Volumes 287-290)
• Pages: 1841-1846
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.287-290.1841
• Online since: July 2011
• Authors: Li Li Chen, Zu Min Qiu, Zhen Zhong Huang, Yan Fen Wu
• Keywords: Extraction, Palladium(ii), Sulfoxide Podands, Synthesis

References

[1] A.A. Mhaske, P.M. Dhadke: Hydrometallurgy, Vol. 61 (2001) No.2, pp.143-150.

[2] E.A. Mowafy, H.F. Aly: Journal of Hazardous Materials, Vol. 149 (2007) No.2, pp.465-470.

[3] H. Narita, M. Tanaka, K. Morisaku and T. Abe: Chemistry Letters, Vol. 33 (2004) No.9, pp.1144-1145.

[4] L. Pan, G.B. Gu, F.W. Wang, Y.J. Wei: Chinese Tournal Of Inorganic Chemistry, Vol. 24 (2008) No.4, pp.520-526.In Chinese.

[5] Wu S.P., Gu G.B., Behavior and mechanism of the extraction of platinum (IV) with cyclic sulfoxide derivative-OTMSO, Rare Met. Mater. Eng. 33(2004) 957-962.

[6] S.P. Wu, S.Y. Meng, G.B. Gu and Z.Q. Zhang: Rare Metals, Vol. 23 (2004) No.2, pp.97-102.

[7] R. Axen, J. Porath and S. Ernback: Nature, Vol. 214 (1967) No.5095, pp.1302-1304.

[8] K. Inoue, K. Yoshizuda, A. Nakamura and S. Honda: Solvent Extraction Research and Development, Vol. 2 (1995) pp.221-228.In Japanese.

[9] K.C. Zhang, J. Chen: Study on Composition and structure of Sulfoxide Pd(II)(Ph.D., Shanghai metallurgical research institute of the Chinese academy of sciences, China 1994), pp.8-12.

[10] P.A. Lewis, D.F.C. Moms, E.L. Short and D.N. Waters: Journal of Less Common Metals, Vol. 45 (1976) No.2, pp.193-214.

[11] H.C. Chen, Z.Z. Liu and W. Liu: Synthetic Communication, Vol. 20~21 (1990), pp.313-316.