Chemical Reactivity of Tributyl Phosphate with Selected Solvent Extraction Reagents
Abstract
It has recently been shown that Cyanex 272 can react with tributyl phosphate (TBP) to form the corresponding butyl ester species under both commercial and anhydrous operating conditions. The present work found that acidic organic extractants MEHPA, DEHPA, Ionquest 801, Cyanex 302, Cyanex 301, and decanoic acid also react with TBP to form the corresponding butyl ester species and dibutyl phosphate under anhydrous conditions at 65°C, whereas non-acidic reagents Alamine 308, LIX 84, LIX 63, and Acorga M5640 do not. Excluding MEHPA, the rate of ester formation appears inversely correlated with the pKa of the organic acid used.
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Cyanex 301 and Cyanex 302 react with TBP to form corresponding butyl esters and dibutyl phosphate at 65 C under anhydrous conditions, with rate order Cyanex 301 > Cyanex 302 > Cyanex 272.
“Cyanex 301 and Cyanex 302 also react with TBP to form the corresponding butyl esters, and dibutyl phosphate at 65 C under anhydrous conditions and the rate order is Cyanex 301 > Cyanex 302 > Cyanex 272.”
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 [24]
The loss of dithiophosphinic acid in Cyanex 301 is so fast that only 10% remains after six weeks of operation.
“Namely, the loss of dithiophosphinic acid in Cyanex 301 is so fast that only 10% remain after six weeks of operation.”
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 [24]
Some Cyanex 301 degrades to thiophosphinic (Cyanex 302) and phosphinic acid (Cyanex 272) analogs, which in turn also undergo reactions with TBP.
“Besides, some Cyanex 301 also degrades to thiophosphinic (Cyanex 302) and phosphinic acid (Cyanex 272) analogs, which in turn also undergo reactions with TBP.”
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 [24]
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- Authors
- Barnard, K. R., Shiers, D. W., & Kelly, N. J.
- Affiliations
- Commonwealth Scientific and Industrial Research Organisation (AU)
- Corresponding author
- Barnard, K. R.
- Venue
- Solvent Extraction and Ion Exchange
- Publisher
- Informa UK Limited
- Published
- 2012-10
- Volume
- 30
- Issue
- 6
- Pages
- 651-667
- ISSN
- 0736-6299 (ISSN-L)
- 1532-2262
- OpenAlex
- W2059225006
- Cited by
- 4
- References
- 25
- Citations by year
- 2026: 1 · 2020: 1 · 2018: 1 · 2014: 1
- FWCI
- 0.17
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Solvent Extraction and Ion Exchange (publishedVersion)
- Funders
- University of Arizona
- Sasol
- Topics
- Physical Sciences › Chemistry › Inorganic Chemistry › Radioactive element chemistry and processing
- Physical Sciences › Engineering › Mechanical Engineering › Extraction and Separation Processes
- Physical Sciences › Environmental Science › Waste Management and Disposal › Chemical Synthesis and Characterization
- Keywords
- tributyl phosphate, solvent extraction reagents, dibutyl phosphate, Cyanex 272, D2EHPA, Cyanex 302, Cyanex 301, capric acid, LIX 63, anhydrous conditions, pKa, reagent reactivity
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