Extraction of f Elements and Technetium from HNO<sub>3</sub>Solutions with Solutions of Alkyl (N,N-Diethylcarbamoylmethyl)phenylphosphinates

Morgalyuk, V. P.; Pribylova, G. A.; Drozhko, D. E.; Иванова, Л. А.; Kalyanova, R. M.; Аrtyushin, О. I.; Logunov, M. V.; Тананаев, И. Г.; Mastryukova, T. A.; Myasoedov, Β. F.

doi:10.1023/b:rach.0000024939.82904.d5

Cited by 7 publications

(6 citation statements)

References 6 publications

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“…Our results show that POLYORGS F-4 and F-5 containing carbamoylmethylphosphinate groups exhibit high sorption capacity for actinides in nitric acid solutions, which is consistent with the published data on solvent extraction with these compounds [1,2]. Data on sorption of Pu from HNO 3 solutions (Fig.…”

Section: Sorption Of Actinides On Sorbents With Bidentate Chelating Gsupporting

confidence: 92%

“…Decision on the ligands for preparation of POLY-ORGS F-4, F-5, and F-6 was based on their capability to form stable chelates with actinides in nitric acid solutions [2,3]. Our results show that POLYORGS F-4 and F-5 containing carbamoylmethylphosphinate groups exhibit high sorption capacity for actinides in nitric acid solutions, which is consistent with the published data on solvent extraction with these compounds [1,2].…”

Section: Sorption Of Actinides On Sorbents With Bidentate Chelating Gsupporting

confidence: 88%

“…As ligands we used compounds synthesized at the Laboratory of Organophosphorus Compounds, Nesmeyanov Institute of Organoelemental Compounds, Russian Academy of Sciences. Some of these com-pounds were previously tested as extractants for recovery of actinides [1,2,4]. The results revealed that they are promising compounds for preparation of chelating sorbents.…”

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confidence: 99%

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Phosphoryl-Containing Chelating Sorbents for Concentrating Actinides

et al. 2005

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New chelating sorbents with phosphinate, carbamoylmethylphosphinate, and methylenediphosphine dioxide functionalities are synthesized by chemical and noncovalent binding of the ligands to polymer matrices, chloromethylated styrene copolymer and XAD-7 acrylate polymer. The sorption and kinetic characteristics of the sorbents with respect to U(VI), Th(IV), Pu(IV), and Am(III) are studied in nitric acid solutions. The sorbents obtained by noncovalent binding of the ligands to XAD-7 demonstrate better kinetic properties. The sorbents can be used for concentrating actinides from 3!5 M HNO 3 and for their partitioning.

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Section: Sorption Of Actinides On Sorbents With Bidentate Chelating Gsupporting

confidence: 92%

Section: Sorption Of Actinides On Sorbents With Bidentate Chelating Gsupporting

confidence: 88%

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Phosphoryl-Containing Chelating Sorbents for Concentrating Actinides

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“…Study of extraction of transuranium ions from acidic media with amides 1 showed that the latter compounds are as good as N,N dialkyl substituted diphenyl(carbamoylmethyl)phos phine oxides for extraction of americium from nitric acid media, and the presence of the hydrogen atom at the nitrogen atom of the amide group increases hydrophilic ity of organophosphorus complexation agents and changes the character of complexation compared to CMPO. 8, 9 Unlike the latter, extraction of Am III showed no pro nounced dependence of the distribution coefficient D Am on the structure of the complexation agent.…”

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Mono and bis[N-aryl(benzyl)]amides of phosphorylacetic acids. One-pot synthesis and extraction of actinides from nitric acid solutions

et al. 2006

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A one pot synthetic route to phosphorylacetic acid N aryl(alkylaryl)amides, including those containing two phosphorylmethylcarbamoyl moieties attached to the arene framework, has been developed. The method is based on reactions of amines with the corresponding acid chlorides generated in situ with the use of phosphorus trichloride as a mild chlorinating agent. The compositions and structures of the compounds obtained and their extraction ability to ward Am III were determined. Suggestions were made about the compositions of the extracted complexes with phosphorylacetic acid N aryl(alkylaryl)amides.

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“…The extraction capacities of compounds 3a-f are much higher than that of 4. 27 Compounds 5a-c are derivatives of methylenedi phosphine dioxides (efficient bidentate extragents). 28 An "anomalous aryl strengthening" (AAS) effect was discov ered in studies of the extraction properties of methylene diphosphine dioxides.…”

Section: The Approachmentioning

confidence: 99%

Dependence of the extraction capacity of neutral bidentate organophosphorus compounds on their structure: a quantum chemical study

et al. 2006

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Correlations between the extraction capacities and molecular structures of organophos phorus compounds (reagents for extraction of transplutonium elements from spent nuclear fuel) were studied using a quantum chemical approach. The results of calculations are in qualitative agreement with experimental data. The approach proposed can be used for analysis of the extraction properties of all classes of organophosphorus compounds and also for predic tion of the most efficient organophosphorus extragents with preset properties.Processing of spent nuclear fuel (SNF) in order to extract uranium and plutonium followed by recovery into fresh nuclear fuel is an important step in a closed fuel cycle. At present, the SNF processing technology used in the Russian Federation is based on the PUREX process, 1 which was initially elaborated to provide plutonium ex traction for military purposes from irradiated uranium lumps. Large scale PUREX processing of SNF for nuclear power engineering, especially at high nuclear fuel burnup, leads to accumulation of large amounts of liquid high level waste (HLW). 2 Therefore, in connection with an increase in the amount of processed SNF and taking into account toughening of requirements for handling of HLW, in the Russian Federation it is planned to fractionate liquid HLW and extract the Cs, Sr, and long lived ac tinide fractions in order to provide separate solidification and subsequent long term storage of the corresponding products. Among methods for HLW fractionation, the leading position is occupied by the extraction techniques involving organophosphorus compounds (OPCs) as the most promising extragents. 3-6The search for highly efficient OPCs is an urgent sci entific and practical problem. In particular, it includes establishment of the dependence of the extraction capac ity (EC) of OPCs on their structure as one of the main goals. To this end, the extraction constants of various elements are often correlated with certain characteristics of the reactivity of extragents, 7,8 e.g., the atomic group electronegativities, 9 the Taft constants σ* (see Ref. 10) and the Kabachnik constants σ P (see Refs 11 and 12, in both cases assuming additive substituent effects), the elec tron density (charge) on the functional atom, the ioniza tion potential, 13 the core s level energies, 14 as well as with the basicity established from the energies of test reactions with the simplest electron acceptors 10,15-18 or from quan tum chemical calculations of the proton affinity energies or the energies of complexation with Li + and LiH (see Refs 14 and 19).Neutral OPCs (NOPCs) is the first class of compounds for which the "EC-structure" correlations were studied systematically. Phosphates, phosphonates, phosphinates, and phosphine oxides have the same reaction center (phorsphoryl group) and form complexes with identical composition (actinide : NOPC ratio) while their ECs sig nificantly increase in this order. A correlation equation was proposed, which relates the parameters lnK ex (K ex is the effective extr...

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Extraction of f Elements and Technetium from HNO₃Solutions with Solutions of Alkyl (N,N-Diethylcarbamoylmethyl)phenylphosphinates

Cited by 7 publications

References 6 publications

Phosphoryl-Containing Chelating Sorbents for Concentrating Actinides

Phosphoryl-Containing Chelating Sorbents for Concentrating Actinides

Mono and bis[N-aryl(benzyl)]amides of phosphorylacetic acids. One-pot synthesis and extraction of actinides from nitric acid solutions

Dependence of the extraction capacity of neutral bidentate organophosphorus compounds on their structure: a quantum chemical study

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Extraction of f Elements and Technetium from HNO3Solutions with Solutions of Alkyl (N,N-Diethylcarbamoylmethyl)phenylphosphinates

Cited by 7 publications

References 6 publications

Phosphoryl-Containing Chelating Sorbents for Concentrating Actinides

Phosphoryl-Containing Chelating Sorbents for Concentrating Actinides

Mono and bis[N-aryl(benzyl)]amides of phosphorylacetic acids. One-pot synthesis and extraction of actinides from nitric acid solutions

Dependence of the extraction capacity of neutral bidentate organophosphorus compounds on their structure: a quantum chemical study

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Extraction of f Elements and Technetium from HNO₃Solutions with Solutions of Alkyl (N,N-Diethylcarbamoylmethyl)phenylphosphinates