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| EXTRACTION OF Zn AND Cd FROM CHLORIDE SOLUTIONS BY TRI-n-BUTYL PHOSPHATE |
| JIANG Tao;SU Yuanfu East China University of Chemical Technology; Shanghai |
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Cite this article:
JIANG Tao;SU Yuanfu East China University of Chemical Technology; Shanghai. EXTRACTION OF Zn AND Cd FROM CHLORIDE SOLUTIONS BY TRI-n-BUTYL PHOSPHATE. Acta Metall Sin, 1990, 26(4): 87-92.
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Abstract Studies have been made on the extraction of Zn and Cd by TBP (tri-n-butyl phosphate) from diluent HCl solutions of NaCl. The experiments show thatthe species extracted from dilueat HCl solutions of NaCl appear to be predominatelyZnCl_2·2TBP and CdCl_2·2TBP. For Cd, at lower acidities, anionic complexes of thetype HCdCl_3 are also extracted. As the acidity is increased, the type H_2CdCl_4 ap-pears to be predominate complexes in organic phase. For Zn, the acido-complexes ofthe type HZnCl_3 appear in organic phase after the acidity of solutions reachs a cer-tain value ([HCl]>0.1 mol/L). Furthermore, the ultraviolet absorption spectra ofboth aqueous and organic phases have been studied, and the infrared spectra of theorganic phases have been examined. The extraction mechanism and temperaturedependence are also discussed.
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Received: 18 April 1990
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