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Synthesis, characterization and properties of 3,3′-diethyl-1,1′-oxydiethylenedicarbonyl bis(thiourea)

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Abstract

In this paper, 3,3′-diethyl-1,1′-oxydiethylenedicarbonyl bis(thiourea) (DEOECTU), was synthesized by phase transfer catalysis and then characterized by UV, elemental analysis, infrared spectra, mass spectrum, 1H NMR and TGA. DEOECTU properties, such as response to metal ions, adsorption on sulfide mineral surfaces, and hydrometallurgical performance as flotation collectors, were also investigated. The results indicated that DEOECTU reacted chemically with Cu2+ ions through its S and N atoms in the C(=S)–NH–C(=O) group to form a new chelate compound, but no reaction of DEOECTU with Zn2+, Pb2+, Fe3+ or Fe2+ ions was observed. The results of adsorption and flotation experiments demonstrated, that compared to pyrite, sphalerite and galena, DEOECTU exhibited a superior collecting power for chalcopyrite and might attach on chalcopyrite surface by chemisorption. The further theoretical analysis from Pearson’s HSAB view point briefly explained the experimental results of the selective response of DEOECTU to Cu2+ ions and chalcopyrite.

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Acknowledgments

The authors would like to thank the National Natural Science Foundation of China (51074183 and 50604016), the National High Technology Research and Development Program of China (863 Program) (2013AA064101), the Foundation for the Author of National Excellent Doctoral Dissertation of China (2007B52) and the Program for New Century Excellent Talents in Chinese University (NCEP-08-0568) for the financial supports of this research.

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Authors and Affiliations

  1. Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China

    Guangyi Liu, Heng Ren, Jinhua Zhan, Jingjing Xiao & Hong Zhong

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  1. Guangyi Liu
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  2. Heng Ren
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  3. Jinhua Zhan
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  4. Jingjing Xiao
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Correspondence to Guangyi Liu.

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Liu, G., Ren, H., Zhan, J. et al. Synthesis, characterization and properties of 3,3′-diethyl-1,1′-oxydiethylenedicarbonyl bis(thiourea). Res Chem Intermed 40, 2025–2038 (2014). https://doi.org/10.1007/s11164-013-1100-9

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