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Acta Metall Sin  1990, Vol. 26 Issue (3): 106-112    DOI:
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SOLVENT EXTRACTION OF Fe (Ⅲ) FROM SULFATE SOLUTIONS WITH TERTIARY AMINES
WU Zhichun;YU Shuqiu;CHEN Jiayong (Chen Chia-yung) Institute of Chemical Metallurgy; Academia Sinica; Beijing
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WU Zhichun;YU Shuqiu;CHEN Jiayong (Chen Chia-yung) Institute of Chemical Metallurgy; Academia Sinica; Beijing. SOLVENT EXTRACTION OF Fe (Ⅲ) FROM SULFATE SOLUTIONS WITH TERTIARY AMINES. Acta Metall Sin, 1990, 26(3): 106-112.

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Abstract  The tertiary amine can be used to extract Fe(Ⅲ) very effectively inthe pH range resulting into partial hydrolysis of Fe~(3+) ions. The iron extractedinto the organic phase can be stripped rather easily with dilute H_2SO_4 or evenwith H_2O. Fe (Ⅲ) is extracted inio the tertiary amine sulfate solution in the formof [(R_3NH)_2Fe(OH)(SO_4)_2]_2 complex by adduct formation. Equation was derived torepresent the chemical reactions involved during extraction. From the infraredspectrum studies on the extraction species in waxy solid form separated from thesolution, sulfate group is a bideniate ligand to the iron atom. The extraction spe-cies has been considered to contain (FeOH)_2 unit based on the ultra violet spectra.The possible structure of the extraction species has been proposed.
Key words:  tertiary amine      extraction      iron      sulfate     
Received:  18 March 1990     
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