The Extraction of Uranium(VI) from Acid Perchlorate Solutions by Di-(2-ethyl-hexyl) -Phosphoric Acid in n-Hexane

Baes, C.F.; Zingaro, Ralph A.; Coleman, C.F.

doi:10.1021/j150560a001

Cited by 161 publications

(38 citation statements)

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“…Solutions containing semi-gross quantities of molybdenum were used to study the effect of molybdenum concentration on the distribution ratio. The distribution ratio was found to increase with increasing molybdenum concentration in the aqueous phase and levels off at a concentration of approxi- [19] in the extraction studies of uranium by HDEHP. • '-v4|…”

Section: Carbon and Oxygen In Sodiummentioning

confidence: 94%

Activation analysis section:

LaFleur¹

1969

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Section: Carbon and Oxygen In Sodiummentioning

confidence: 94%

Activation analysis section:

LaFleur¹

1969

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“…Baes et al (19) have investigated this trimer formation in n-hexane through isopiestic measurements and have found little indication of the trimer species. In subsequent investigations Baes (20) and Baes and Baker (21) suggested HDEHP partial trimerization as an explanation for (20) has included activity coeffi cient determination of the HDEHP dimer in η-octane through isopiestic measurements.…”

Section: Lanthanide Extraction By Organophosphorous Acidsmentioning

confidence: 99%

The Activity Behavior of the NdNO₃—HNO₃—H₂O—HDEHP—AMSCO System

O’Brien

Bautista

1979

Thermodynamic Behavior of Electrolytes in Mixed Solvents—II

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The thermodynamic behavior of the two-phase NdNO 3 -HNO 3 -H 2 O-HDEHP(Di-2-ethylhexyl phosphoric acid)-AMSCO Odorless Mineral Spirits system has been studied to provide experimental data for use with a model to predict the distribution coefficients of neodymium. The presence of high hydrogen ion concentration was taken into account in determining the nitrate ion activities in the aqueous phase using the nitrate ion selective electrode. The nitrate ion concentration in the organic phase was back-extracted with sulfuric acid before analysis with the nitrate and sulfate concentrations. The activity coefficients of the HDEHP dimer were estimated from the data of Baes who made isopiestic comparisons with triphenylmethane in n-octane as the reference solution assuming that the activity coefficient of triphenylmethane is unity. Τ iquid-liquid extraction of the lanthanides from an aqueous salt solution to a chelate in an organic phase has been somewhat difficult to analyze thermodynamically for a number of reasons. First, very httle data exists on the activity behavior of a single-component lanthanide salt in the aqueous solution. These data, generally more common for 1:1 electrolytes such as NaCl, KN0 3 , etc., are in the form of the mean activity coefficient of the salts. Second, this value of the mean activity coefficient for a particular salt is a measure of the combined effect of both 1 Present address: Photo Products Department, Du Pont, Towanda, PA 18848. 0-8412-0428-4/79/33-177-323$05.25/l

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“…At low uranium concentrations, Baes et al (1958) have suggested that U(VI) is extracted from aqueous pherchlorate solutions into n-hexane solutions of di-(2-ethylhexyl)-phosphoric acid (HL) as the U02(HL)2L2 complex. A chelate structure has been proposed for this complex.…”

Section: B Organophosphorus Extractantsmentioning

confidence: 99%

Chemistry of uranium in nonaqueous solution

Gindler¹

1974

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The Extraction of Uranium(VI) from Acid Perchlorate Solutions by Di-(2-ethyl-hexyl) -Phosphoric Acid in n-Hexane

Cited by 161 publications

References 0 publications

Activation analysis section:

Activation analysis section:

The Activity Behavior of the NdNO₃—HNO₃—H₂O—HDEHP—AMSCO System

Chemistry of uranium in nonaqueous solution

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The Extraction of Uranium(VI) from Acid Perchlorate Solutions by Di-(2-ethyl-hexyl) -Phosphoric Acid in n-Hexane

Cited by 161 publications

References 0 publications

Activation analysis section:

Activation analysis section:

The Activity Behavior of the NdNO3—HNO3—H2O—HDEHP—AMSCO System

Chemistry of uranium in nonaqueous solution

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The Activity Behavior of the NdNO₃—HNO₃—H₂O—HDEHP—AMSCO System