A summary of TTA extraction coefficients

Poskanzer, A. M.; Foreman, Bruce M.

doi:10.1016/0022-1902(61)80507-1

Cited by 197 publications

(59 citation statements)

References 38 publications

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“…The extraction constant determined from data in Table 1 From the observation of 0.05 M TTA stoichiometries of about 4 (see Table 1) and the estimates of stability constant for the aqueous phase complexing of Pu(1V) by TTA are on the order of Kl = 60 k 15 10,13,21 , and indicating about 2% aqueous solubility for TTA in benzene. Nash and levela and'^ indicate that consideration of the aqueous PUTTA~' complex is included in the error analysis of PUSOF stability constant.…”

Section: Pu(iv)-tta Extraction Systemmentioning

confidence: 99%

Complexation of plutonium(IV) with sulfate at variable temperatures

Xia

Friese

Moore

et al. 2007

J Radioanal Nucl Chem

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The complexation of plutonium(IV) with sulfate at variable temperatures has been investigated by solvent extraction method. A NaBr03 solution was used as holding oxidant to maintain the plutonium(IV) oxidation state throughout the experiments. The distribution ratio of Pu(1V) between the organic and aqueous phases was found to decrease as the concentrations of sulfate were increased. Stability constants of the 1 : 1 and 1:2 Pu(IV)-HS0; complexes, dominant in the aqueous phase, were calculated from the effect of [HSO;] on the distribution ratio. The enthalpy and entropy of complexation were calculated from the stability constants at different temperatures using the Van't Hoff equation.

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Section: Pu(iv)-tta Extraction Systemmentioning

confidence: 99%

Complexation of plutonium(IV) with sulfate at variable temperatures

Xia

Friese

Moore

et al. 2007

J Radioanal Nucl Chem

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“…Above pH = 9, TTA cleaves into trifluoroacetic acid and acetylthiophene [POS61]. At this point, TTA no longer extracts metals.…”

Section: Introductionmentioning

confidence: 99%

“…The extraction also has a high power dependence on acidity, making separations easily achievable through control of the pH [POS61].…”

Section: Introductionmentioning

confidence: 99%

Studies of fundamental properties of rutherfordium (Element 104) using organic complexing agents

Czerwinski

1992

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“…Finally, also the extraction solvent significantly affects the extraction efficiency. 15 For example, in the extraction of lanthanides with Htta, the dependence of the extraction constant values on the extraction solvents has been confirmed. 7,8,[16][17][18][19] Since the toxic and flammable characteristics of many organic solvents are detrimental to the environment, substitutes have been investigated.…”

Section: Introductionmentioning

confidence: 91%

A Fluorous Biphasic Solvent Extraction System for Lanthanides with a Fluorophilic β-Diketone Type Extractant

et al. 2015

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The properties of a fluorous solvent extraction system for trivalent lanthanide metal ions are reported. A fluorinated extractant, 4,4,5,5,6,6,7,7,8,8,9,9,9-tridecafluoro-1-(2-thienyl)-1,3-nonanedione, and HFE-7200 (C4F9OC2H5) as the extraction solvent were chosen. With this fluorous extractant/solvent combination, higher extraction ratios and separation factors compared to a conventional organic solvent system (thenoyltrifluoroacetone in CHCl3) were achieved for 5 heavy lanthanide ions (Lu, Yb, Tm, Er and Ho). On the other hand, light lanthanide ions (Nd, Pr, Ce and La) are hardly extracted, therefore enabling the mutual separation of light lanthanides from middle or heavy lanthanide ions.

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A summary of TTA extraction coefficients

Cited by 197 publications

References 38 publications

Complexation of plutonium(IV) with sulfate at variable temperatures

Complexation of plutonium(IV) with sulfate at variable temperatures

Studies of fundamental properties of rutherfordium (Element 104) using organic complexing agents

A Fluorous Biphasic Solvent Extraction System for Lanthanides with a Fluorophilic β-Diketone Type Extractant

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