The solvent extraction of Am(VI) using centrifugal contactors

Mincher, Bruce J.; Tillotson, Richard D.; Garn, Troy G.; Rutledge, Veronica; Law, Jack D.; Schmitt, Nicholas C.

doi:10.1007/s10967-015-4397-6

Cited by 12 publications

(10 citation statements)

References 6 publications

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“…Schematic representation of hot test showing three extraction stages: stage‐1 to extract Am and Ce, stage‐2 nominal Am strip, and stage‐3 nominal Ce strip 133 (Based on Figure 1 in the cited article).…”

Section: Centrifugal Extractors Applicationsmentioning

confidence: 99%

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Liquid‐Liquid Centrifugal Extractors: Types and Recent Applications – a Review

Hamamah

Grützner

2022

ChemBioEng Reviews

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In light of the elevating pressures toward adopting intensifying technologies, centrifugal extractors are increasingly drawing attention as a promising alternative to traditional extraction equipment. Recently, many fields have applied them in research and that resulted in a considerable amount of information that may be hard to follow. To keep interested researchers updated, this work presents the state‐of‐the‐art status of those devices. That is, the different types of centrifugal extractors are first surveyed with emphasis on those available on the market nowadays. Then, their recent applications are covered with exclusion of two fields: oil‐water separations and nuclear industry, as the purpose is to accent centrifugal extractors' potential and compatibility with the widest possible range of applications beyond traditional ones. A further section addresses the hydrodynamics of annular centrifugal contactors that form a major subfamily of centrifugal extractors. Those annular variants have received special focus throughout this work, since not only are they the most encountered devices in literature but also still to date under development with latest versions being 3D‐printed.

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Section: Centrifugal Extractors Applicationsmentioning

confidence: 99%

“…Chemical Industries 3.4.1 Extraction of Rare Earth Elements 3.4.1.1 Separation of Cerium and Americium[133] …”

mentioning

confidence: 99%

Liquid‐Liquid Centrifugal Extractors: Types and Recent Applications – a Review

Hamamah

Grützner

2022

ChemBioEng Reviews

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“…The standard potential for the Am(III)/Am(VI) redox couple under acidic conditions is about 1.7 V, and thus strong oxidizing agents are required [1,11]. Several oxidants have been explored including peroxydisulfate [12,13], copper(III) periodate [14,15], electrochemical techniques [16], and sodium bismuthate [5][6][7][8]17]. Once oxidized the Am(VI) exists as the americyl AmO 2 2+ ion and behaves similarly to the other hexavalent actinyl cations.…”

Section: Theorymentioning

confidence: 99%

“…Several ligands have been evaluated for Am(VI) extraction including conventional tributylphosphate (TBP) [6], its more basic analogues dibutylbutylphosphonate (DBBP) [5] and diamylamylphosphonate (DAAP) [7]. Prior development efforts have resulted in the demonstration of the extraction of Am(VI) in engineering-scale centrifugal contactors using DAAP [8].…”

Section: Introductionmentioning

confidence: 99%

Oxidation and extraction of Am(VI) using a monoamidic extractant in 3D printed centrifugal contactors

Law

Mincher

Tillotson

et al. 2018

J Radioanal Nucl Chem

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A series of tests were performed using centrifugal contactors to evaluate the separation of Am(VI) from cerium, as well as to determine the efficiency of the contactors. All experiments were performed using 2-cm, acrylic 3D-printed centrifugal contactors.Solvent extraction tests were performed using 1 M N,N-di(2-ethylhexyl)butyramide (DEHBA)/dodecane and a nitric acid feed solution spiked with 243 Am and 139 Ce and oxidized with 60 mg mL -1 sodium bismuthate. Approximately 72 % of the Am was extracted with a single contactor stage. Co-stripping of Am and Ce was demonstrated but attempts at selective stripping were not successful. Successful recycle of the used organic phase was demonstrated. Contactor efficiencies of 95 % to 100 % were obtained.

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“…Over the years, several efforts have been made to investigate the liquid–liquid disengagement experimentally in various extraction equipment, for example, gravity settlers, 2‐5 pulsed–sieve extraction column, 6,7 RDCs, 8,9 and centrifugal contactors 10‐12 . Based on these measurements, different phenomenological models have been developed to predict the rate of phase separation in continuous gravity settlers 2,4 and batch settlers 13‐16 .…”

Section: Introductionmentioning

confidence: 99%

Separation of liquid–liquid dispersion in a batch settler: CFD‐PBM simulations incorporating interfacial coalescence

Thaker

Buwa

2020

AIChE Journal

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Several commercially important chemical processes involve liquid-liquid phase separation. In the present work, we have developed a multi-fluid Eulerian CFD model using OpenFOAM that incorporates binary and interfacial coalescence processes. We simulated separation of kerosene dispersed in water in a batch settler and validated the predictions using the measurements of time-evolution of coalescing and settling interfaces, local dispersed-phase volume fraction (α O) and drop size distribution (DSD). Simulations are performed to understand the contributions of binary and interfacial coalescence processes to the phase separation process. While the timeevolution of coalescing and settling fronts can be predicted reasonably well using the two-fluid model with empirically-corrected drag models, local α O and DSD could not be predicted. We have shown that the comprehensive multi-fluid Eulerian model, which incorporates binary and interfacial coalescence, predicts the time-evolution of the coalescing and settling fronts, local α O and the DSD in an excellent agreement with the measurements.

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The solvent extraction of Am(VI) using centrifugal contactors

Cited by 12 publications

References 6 publications

Liquid‐Liquid Centrifugal Extractors: Types and Recent Applications – a Review

Liquid‐Liquid Centrifugal Extractors: Types and Recent Applications – a Review

Oxidation and extraction of Am(VI) using a monoamidic extractant in 3D printed centrifugal contactors

Separation of liquid–liquid dispersion in a batch settler: CFD‐PBM simulations incorporating interfacial coalescence

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