Chemical Reactivity of Tributyl Phosphate with Selected Solvent Extraction Reagents |
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| Authors: | K R Barnard D W Shiers N J Kelly |
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| Affiliation: | 1. The Parker Centre/CSIRO Process Science and Engineering/CSIRO Minerals Down Under National Research Flagship , Karawara , WA , Australia Keith.Barnard@csiro.au;3. The Parker Centre/CSIRO Process Science and Engineering/CSIRO Minerals Down Under National Research Flagship , Karawara , WA , Australia |
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| 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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| Keywords: | tributyl phosphate TBP Cyanex DEHPA Ionquest MEHPA Alamine LIX Acorga Versatic |
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