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Korean Journal of Metals and Materials > Volume 55(6); 2017 > Article
Korean Journal of Metals and Materials 2017;55(6): 405-411. doi: https://doi.org/10.3365/KJMM.2017.55.6.405
Solvent Extraction of Tungsten(VI) from Moderate Hydrochloric Acid Solutions with LIX 63
Hoai Thanh Truong1, Yong Hwan Kim2, Man Seung Lee1
1Department of Advanced Materials Science & Engineering, Institute of Rare Metal, Mokpo National University, Jeollanamdo 58554, Republic of Korea
2Korea Institute of Industrial Technology, Incheon Technology Service Centre, Incheon 21999, Republic of Korea
Correspondence  Man Seung Lee ,Tel: +82-61-450-2492, Email: mslee@mokpo.ac.kr
Received: 23 November 2016;  Accepted: 10 January 2017.  Published online: 1 June 2017.
ABSTRACT
The solvent extraction of tungsten(VI) from hydrochloric acid solutions using 5,8-diethyl- 7-hydroxydodecan-6-one oxime (LIX 63) was analyzed in solutions having an initial pH range from 2 to 5, by varying the concentration of metal and extractant. In our experimental range, the cationic exchange reaction as well as the solvation reaction occurred simultaneously. The cation exchange reaction was identified by applying a slope analysis method to the extraction data. The existence of cationic tungsten(VI) species was confirmed by ion exchange experiments with Diphonix resin at pH 3. Further study is needed to identify the nature of this tungsten cationic species.
Keywords: solvent extraction, ion exchange, tungsten, hydrochloric acid, LIX 63.
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