ChemInform Abstract: ZIRKONIUM‐DI‐N‐BUTYL‐PHOSPHATE

Solovkin, A.S.; Krutikov, P.G.; Panteleeva, A. N.

doi:10.1002/chin.197011316

Cited by 2 publications

(3 citation statements)

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“…Later, Weaver [2] demonstrated that Zr(NO 3 ) 2 (A) 2 (HA) 2 is formed in the extract, and at a greater HDBP excess ZrA 4 (HA) 4 is extracted from 1 -1.5 mol/L HNO 3 [3] while at the deficiency of HDBP Zr(NO 3 ) 2 A 2 is formed [4]. It was also found, that complex acidic Zr salts with alkyl phosphoric acids, including HDBP [5], have strong extraction ability towards rare earths (RE), transplutonium elements (TPE) and strontium [2].…”

Section: Introductionmentioning

confidence: 99%

The influence of dibutyl phosphoric acid on zirconium extraction with diluted tributyl phosphate and the role of uranyl nitrate

et al. 2006

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Distribution coefficients of zirconium (D Zr ) in the 30% TBP -aqueous HNO 3 solution extraction system rise 1000-2000 times with the increase of the dibutyl phosphoric acid (HDBP) concentration from 0 to 0.01-0.08 mol/L. A solvate with the molar ratio Zr: HDBP = 1 was found by IR spectroscopy and analytic methods in the initial range of HDBP concentration. In the presence of U(VI) D Zr decreases with the growing U concentration, however, the ratio of Zr distribution coefficient in the presence of HDBP (D AZr ) to D Zr determined in its absence, R Zr = D Azr /D Zr , is rather high. Function of enhancement (F) was introduced for the evaluation of simultaneous influence of U and HDBP on Zr extraction. An increase of the U concentration resulted first in the decrease in F Zr , and then in its increase. The rising part of the F Zr curve was more noticeable at a molar excess of Zr over HDBP. The mechanism of Zr extraction by 30% TBP solution in the presence of HDBP when Zr is in excess to HDBP indicates the formation of the solvate with the ratio Zr: HDBP = 1; in the presence of U(VI) the complex with the same ratio is formed by the HDBP interaction with U in the system with a great excess of both HDBP and Zr.

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Section: Introductionmentioning

confidence: 99%

The influence of dibutyl phosphoric acid on zirconium extraction with diluted tributyl phosphate and the role of uranyl nitrate

et al. 2006

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“…Extraction systems based on zirconium salts (ZS) of alkyl phosphoric acids (HAP) are well-known [ 1] and can be used for recovery of RE, TPE and other metals from nitric acid solutions [2][3][4]. A model of Eu extraction by zirconium salts of di-2-ethylhexyl phosphoric acid (ZS-HD2EHP) was proposed [5], which consisted of both ion exchange and solvation.…”

Section: Introductionmentioning

confidence: 99%

“…Reaction constants according to equations (1),(2) and(3)for RE, Y and TPE in their extraction with 0.2 mol/L ZS-HDBP (Zr:HDBP= 1:9) dissolved in 30% TBP.…”

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confidence: 99%

Extraction of transplutionium and rare-earth elements, molybdenum and iron with zirconium salt of dibutyl phosphoric acid

et al. 2003

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Zirconium salt of dibutyl phosphoric acid (ZS-HDBP) dissolved in dilute tributyl phosphate (TBP) is proposed as a solvent for separation of transplutonium and rare-earth elements (TPE, RE), including yttrium, from high-level waste in the presence of molybdenum and iron. The optimum HDBP:Zr ratio is 9 for RE and TPE extraction and is 12.5 for Mo. IR spectra indicate formation of Zr(DBP)4(HDBP)4 complex as a base of solvation. HNO3 depresses RE and TPE extraction, while Mo extraction is characterised by a minimum at 2.5 mol/L HNO 3. Presence of TBP in the solvent, independently of the used diluent, leads to reduction of the distribution coefficients, but ZS-HDBP extraction capacity for the above elements is increased, as well as solubility of their solvates.Two types of complexes M(DBP)3 and MNO3(DBP)2 are formed at RE and TPE extraction by ZS-HDBP in dilute TBE Molybdenum extraction is based both on cation exchange and on Mo solvation with HDBP as a neutral ligand. Iron extraction is formally similar to that of Mo, being influenced by the latter if both metals are present in the solution.

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ChemInform Abstract: ZIRKONIUM‐DI‐N‐BUTYL‐PHOSPHATE

Abstract: Zr(IV) bildet mit Dibutylphosphat die Komplexe (I), (II) und (III), deren Löslichkeiten in 6m Salpetersäure, in n‐Decan und in n‐Decan‐Dibutylphosphat‐Gemischen untersucht werden.

Cited by 2 publications

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The influence of dibutyl phosphoric acid on zirconium extraction with diluted tributyl phosphate and the role of uranyl nitrate

The influence of dibutyl phosphoric acid on zirconium extraction with diluted tributyl phosphate and the role of uranyl nitrate

Extraction of transplutionium and rare-earth elements, molybdenum and iron with zirconium salt of dibutyl phosphoric acid

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