Cyanex 302: An extractant for Fe3+ from Chloride Medium
Open accessAbstract
The solvent extraction of Fe3+ from aqueous chloride solution by bis-(2,4,4-trimethylpentyl) monothiophosphinic acid (Cyanex 302, H2A2) dissolved in kerosene has been investigated over a wide range of aqueous acidity as a function of phase contact time, concentrations of Fe3+, H+ and Cl- in the aqueous phase, Cyanex 302 concentration in the organic phase and temperature. The equilibration time is 50 min. The distribution ratio is found to be independent on [Fe3+] in the aqueous phase at a constant aqueous acidity and extractant concentration. The H+, extractant and Cl- dependences are -1, 0.5 in low concentration region of extractant and -0.5, respectively; which suggest that extraction occurs via the following two parallel reactions: (i) FeCl3 + 0.5 H2A2(o) FeCl2.A(o) + H+ + Cl-; and (ii) FeCl2 + + 0.5 H2A2(o) -----FeCl2A(o) + H+. Temperature dependence data give ΔH value of 9.95 kJ/ mol. The loading capacity of Cyanex 302 towards Fe3+ is 29.41 g Fe3+/100 g Cyanex 302. The extraction equilibrium constant (Kex) is 10-0.632. Extraction ratio is found to be dependent on diluent used. Stripping of the extracted complex is found to be a difficult task, but may be made effective by a solution containing 6 M H2SO4 and 1 M Na2C2O4. Keywords: Extraction equilibrium; Fe3+ extraction; Cyanex 302; Chloride medium.DOI: http://dx.doi.org/10.3329/bjsir.v46i4.9583 BJSIR 2011; 46(4): 407-414
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Extraction efficiency depends on temperature and polarity of diluents.
“However, the extraction e ciency depends on the temperature and the polarity of the diluents.”
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 [29]
A high loading capacity of Cyanex 302 for Fe(III) (29.41 g Fe(III)/100 g Cyanex 302) was obtained from a 1 M HCl solution.
“Ahigh loading capacity of Cyanex 302 for Fe(III) (29.41 g Fe(III) / 100 g Cyanex 302) was obtained from a 1 M HCl solution [29].”
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 [29]
Strong interaction between polar diluents and extractants leads to a decrease in extraction efficiency of Co(II).
“In general, the strong interaction between polar diluents and extractants leads to a decrease in the extraction e ciency of Co(II) [7,29].”
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 [29]
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- Authors
- Ali, M., Biswas, R., Salam, S., Akhter, A., Karmakar, A., & Ullah, M.
- Affiliations
- University of Rajshahi (BD)
- Bangladesh Council of Scientific and Industrial Research (BD)
- Venue
- Bangladesh Journal of Scientific and Industrial Research
- Publisher
- Bangladesh Academy of Sciences
- Published
- 1970-01-01
- Volume
- 46
- Issue
- 4
- Pages
- 407-414
- ISSN
- 0304-9809 (ISSN-L)
- 2224-7157
- OpenAlex
- W2057065831
- Cited by
- 7
- References
- 22
- Citations by year
- 2023: 1 · 2020: 2 · 2014: 1 · 2013: 1 · 2012: 2
- FWCI
- 0.00
- Type
- journal article
- Language
- en
- Open access
- diamond
- doi.org
- Licence
- cc-by-nc
- Locations
- Bangladesh Journal of Scientific and Industrial Research (publishedVersion, cc-by-nc)
- Funders
- University of Chittagong
- Topics
- Physical Sciences › Engineering › Mechanical Engineering › Extraction and Separation Processes
- Physical Sciences › Chemical Engineering › Filtration and Separation › Chemical and Physical Properties in Aqueous Solutions
- Physical Sciences › Chemistry › Inorganic Chemistry › Radioactive element chemistry and processing
- Keywords
- Cyanex 302, solvent extraction, iron(III) extraction, chloride media, distribution ratio, extraction equilibrium, extraction enthalpy, loading capacity, stripping, diluent effects, ferrous iron
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