Extraction of Palladium(II) from Hydrochloric Acid Solutions by Solvent Extraction with Mixtures Containing Either Cyanex 301 or LIX 63
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Abstract
Cyanex 301 and 5,8-diethyl-7-hydroxyldodecane-6-oxime (LIX 63) can selectively extract Pd(II) over Pt(IV) from concentrated hydrochloric acid solutions. Therefore, solvent extraction experiments have been performed by extractant mixtures containing either Cyanex 301 or LIX 63, and the extraction behavior of Pd(II) was compared. Among the mixtures of Cyanex 301, the highest synergistic enhancement coefficient was achieved by mixing Cyanex 301 and trioctylphosphine oxide (TOPO). However, it was very difficult to strip the Pd(II) from the loaded mixture phase. Among the mixtures of LIX 63, the mixture of LIX 63 and alamine 336/TOPO enhanced the extraction of Pd(II). Although the synergistic coefficient by Cyanex 301 + TOPO was higher than that by LIX 63 + Alamine 336, the Pd(II) in the loaded mixture phase of LIX 63 and alamine 336 was easily stripped by thiourea.
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Cyanex 301 can completely extract Pd(II) in HCl concentration range 1 to 9 M, while Cyanex 272 is not effective.
“Cyanex 301 can completely extract Pd(II) in the HCl concentration range of 1 to 9 M, while Cyanex 272 is not e ective.”
From Review on the Comparison of the Chemical Reactivity of Cyanex 272, Cyanex 301 and Cyanex 302 for Their Application to Metal Separation from Acid Media (2020) · cites this paper as [33]
Cyanex 301 was employed to separate Pd(II) over Pt(IV) from hydrochloric acid solutions.
“Cyanex 301 was employed to separate Pd(II) over Pt(IV) from hydrochloric acid solutions [33].”
From Review on the Comparison of the Chemical Reactivity of Cyanex 272, Cyanex 301 and Cyanex 302 for Their Application to Metal Separation from Acid Media (2020) · cites this paper as [33]
Stripping of Pd(II) from Cyanex 302 and some mixtures of Cyanex 301 require use of a soft ligand like thiourea in HCl, HClO4, and HNO3, but not H2SO4 because of protonation of thiourea.
“The stripping of Pd(II) from Cyanex 302 and some mixtures of Cyanex 301 require the use of a soft ligand like thiourea in HCl, HClO4, and HNO3, but not H2SO4 because of the protonation of thiourea [31,33].”
From Review on the Comparison of the Chemical Reactivity of Cyanex 272, Cyanex 301 and Cyanex 302 for Their Application to Metal Separation from Acid Media (2020) · cites this paper as [33]
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- Authors
- Truong, H., Lee, M., & Son, S.
- Affiliations
- Mokpo National University (KR)
- Korea Institute of Industrial Technology (KR)
- Corresponding author
- Lee, Man
- ORCID
- Venue
- Metals
- Publisher
- MDPI AG
- Published
- 2017-12-04
- Volume
- 7
- Issue
- 12
- Pages
- 541
- ISSN
- 2075-4701 (ISSN-L)
- OpenAlex
- W2775633984
- Cited by
- 20
- References
- 25
- Citations by year
- 2025: 2 · 2024: 2 · 2022: 1 · 2021: 7 · 2020: 4 · 2019: 1 · 2018: 3
- FWCI
- 1.70
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Metals (publishedVersion, cc-by)
- Preprints.org (acceptedVersion, cc-by)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
- Funders
- Korea Institute of Energy Technology Evaluation and Planning (20165010100810)
- Topics
- Physical Sciences › Engineering › Mechanical Engineering › Extraction and Separation Processes
- Physical Sciences › Chemistry › Inorganic Chemistry › Radioactive element chemistry and processing
- Physical Sciences › Chemistry › Analytical Chemistry › Analytical chemistry methods development
- Keywords
- palladium(II) extraction, solvent extraction, Cyanex 301, LIX 63, trioctylphosphine oxide, synergistic enhancement, hydrochloric acid solutions, thiourea stripping, Alamine 336
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