Extraction of Non-Ferrous Metals and Iron with Systems based on Bis(2,4,4-Trimethylpentyl)Dithiophosphinic Acid (CYANEX 301), A Review
Abstract
Extraction is widely used in the hydrometallurgy of nonferrous metals. In addition to such well-known extractants as oxygen-containing organophosphorus or monocarboxylic acids, thio-substituted organophosphorus acids in particular, the commercially available extractant CYANEX 301, the active component of which is bis(2,4,4-trimethylpentyl)dithiophosphinic acid (HR), is of interest. This extractant is a sulfur-containing analogue of CYANEX 272 (bis(2,4,4-trimethylpentyl) phosphinic acid). In this review, the state of CYANEX 301 in various solvents in the absence and presence of electron-donor additives, the chemistry of the extraction processes of non-ferrous metals in the HR systems, the compositions of the extracted compounds, stability of the extractant in aggressive media, technological developments, and prospects for using CYANEX 301 in hydrometallurgy of non-ferrous metals are discussed.
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CuR2 (extracted complex of Cu(II) with Cyanex 301/302) is further polymerized in the organic phase to form oligomeric multinuclear copper complexes.
“Namely, CuR2 (extracted complex of Cu(II) with Cyanex 301 / Cyanex 302) is further polymerized in the organic phase to form oligomeric multinuclear copper complexes.”
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 [40]
High cost of thiourea and toxicity of hydrazine limits commercial application of this method.
“However, the high cost of thiourea and the toxicity of hydrazine limits the commercial application of this method [40].”
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 [40]
In this mixture, thiourea acted as stripping agent, while hydrazine lessened formation of disulfide.
“In this mixture, thiourea acted as the stripping agent, while hydrazine lessened the formation of disulfide.”
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 [40]
In case of Cu(II), stripping from loaded phase of Cyanex 301, an aqueous solution of thiourea, hydrazine, and sodium hydroxide was used, resulting in quantitative stripping as well as regeneration of extractant.
“In the case of Cu(II), stripping from the loaded phase of Cyanex 301, an aqueous solution of thiourea, hydrazine, and sodium hydroxide was used, resulting in a quantitative stripping as well as the regeneration of the extractant.”
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 [40]
Extraction in an inert gas stream (nitrogen or carbon dioxide) can result in efficient stripping of Co(II) and prevent oxidation of Cyanex 301.
“This route can result in an e cient stripping of Co(II) and prevent the oxidation of Cyanex 301.”
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 [40]
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- Authors
- Fleitlikh, I. Y., Grigorieva, N. A., & Logutenko, O. A.
- Affiliations
- Krasnoyarsk Scientific Center (RU)
- Siberian Branch of the Russian Academy of Sciences (RU)
- Corresponding author
- Grigorieva, N. A.
- Venue
- Solvent Extraction and Ion Exchange
- Publisher
- Informa UK Limited
- Published
- 2017-12-07
- Volume
- 36
- Issue
- 1
- Pages
- 1-21
- ISSN
- 0736-6299 (ISSN-L)
- 1532-2262
- OpenAlex
- W2773099858
- Cited by
- 19
- References
- 69
- Citations by year
- 2026: 2 · 2025: 1 · 2024: 2 · 2022: 2 · 2021: 4 · 2020: 5 · 2019: 3
- FWCI
- 1.70
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Solvent Extraction and Ion Exchange (publishedVersion)
- 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
- Cyanex 301, iron extraction, hydrometallurgy, solvent extraction, Cyanex 272
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