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Influence of aggregation on the extraction of trivalent lanthanide and actinide cations by purified Cyanex 272, Cyanex 301, and Cyanex 302

“…The extraction of trivalent f -element ions into n-dodecane by each of the extractants is in agreement with previous results [5,8,9,[26][27][28][29][30]. Slope analysis of the hydrogen ion dependence of the extraction are summarized in Fig.…”

“…4a, c, and e) under the conditions studied for each of the extractants, however. At this level of detail, which does not include consideration of the dimerization constant of HC301, the extractant dependencies we report are consistent with the literature [5,8,9,27,28,30] and with Eq. (1) for HC301.…”

“…1), the primary component of the commercially available extractant Cyanex 301. Previous work with this extractant [5][6][7][8][9] has relied on the idea that the organodithiophosphinic acid extractants are present exclusively as hydrogen *Author for correspondence (E-mail: mjensen@anl.gov). 1 bonded dimers in non-polar solvents, and consequently that the extraction of trivalent f -element cations produces a 1 : 4 (M : C301) stoichiometry according to the equilibrium:…”

Development of Highly Selective Ligands for Separations of Actinides from Lanthanides in the Nuclear Fuel Cycle

“…19 Promising results were also observed in the extraction of An(III) and Ln(III) from acetic acid/ammonium acetate buffered solutions that would result from a preceding TRUEX separation step. 20 In addition, the successful separation of An(III) from Ln(III) by purified bis(2,4,4-trimethylpentyl)dithiophosphinic acid (6) immobilized on silica resins, 21 enclosed in biopolymer microcapsules, 22 or in supported liquid membranes, 23 has been demonstrated. In a laboratory-scale countercurrent extraction test, >99.998% of Am(III) was extracted and separated from macro amounts of Ln(III) using purified 6 and tributyl phosphate.…”

A pH dependent transport and back transport of americium(iii) through the cellulose triacetate composite polymer membrane of cyanex-301 and TBP: role of H-bonding interactions

“…[12][13][14][15] Polymer inclusion membranes (PIM) are important in the development of sensors, ion selective electrodes and also in separation sciences. Though few literature reports are available on the Ln(III)/An(III) transport through the supported liquid membrane (SLM) of Cyanex-301, 16,17 no literature data is available on the transport study of the actinides through the PIM of Cyanex-301. PIMs are more promising as compared to the SLM from the stability point of view.…”