Anion Exchange Equilibrations in Phosphoric Acid Solutions

“…The separation of 96 Zr-96 Nb from uranium fission products by ion exchange method has been reported by many investigators [1][2][3][4]. Most such work has concentrated on the use of organic exchangers, such as anion exchanger Dowex-2 with HCl solution, HN0 3 solution, H 2 S0 4 solution and HCl-ΗΓ solutions [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…Most such work has concentrated on the use of organic exchangers, such as anion exchanger Dowex-2 with HCl solution, HN0 3 solution, H 2 S0 4 solution and HCl-ΗΓ solutions [2][3][4]. The cation exchanger Dowex 50 · 8 HCl system has also been used for the separation of Zr -Nb from fission products [1], but both of them could not get highest radiochemical purity.…”

Section: Introductionmentioning

confidence: 99%

“…It has been taken as a standard method for tail-end 233 U and enriched uranium purification [5]. The adsorption of 95 Zr and 95 Nb on silica gel in HCl, HC10 4 , H 2 S0 4 , and HNOg solution have been tentatively studied J by TSALETKA [6] and AKATSU [7]. The separation of 9S Zr and 96 Nb mixture by using silica gel adsorption has been reported by ABBLAND [8] and GARHY [9].…”

Section: Introductionmentioning

confidence: 99%

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The Separation of ⁹⁵Zr and ⁹⁵Nb from Irradiated Uranium by Silica Gel Adsorption

Ting

1976

Radiochimica Acta

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Distribution coefficients have been measured of ruthenium, cerium, zirconium and niobium in the systems silica gel-nitric acid. Ruthenium and cerium had no significant adsorption. Zirconium showed an adsorption maximum at 1 Ν HNO,. The adsorption of niobium increases with increasing nitric acid concentration from 0.1 to 15 M. A rapid separation and determination of carrier free zirconium and niobium from irradiated uranium is evolved from the equilibrium data on silica gel-nitric acid. The chemical yield and the radiochemical purity of 85 Zr and 95 Nb are normally greater than 99%. ZusammenfassungEs wurden im System Silicagel-Salpetersäure Verteilungsfaktoren für Ru, Ce, Zr und Nb gemessen. Ru und Ce zeigten keine nennenswerte Adsorption. Zr zeigte Adsorptionsmaximum bei 1Ν HN0 3 . Die Adsorption von Nb steigt mit steigender Säurekonzentration von 0,1-15 M. Schnelle Trennung und Bestimmung von trägerfreienf'Zr und Nb aus bestrahltem Uran ergibt sich aus den Gleichgewichtsdaten. Ausbeute und Reinheit von 95 Zr und 95 Nb sind im allgemeinen besser als 99%. RésuméOn a mesuré les coefficients de répartition du ruthénium, du cérium, du zirconium et du niobium en système silicagel -acide nitrique. L'adsorption est insignifiante pour le ruthénium et le cérium. Pour le zirconium, elle est maximale avec 1Ν HN0 3 . Quant au niobium, elle augmente avec la concentration de l'acide nitrique de 0,1 à 15 M. La connaissance des données d'équilibre du système silicagel-acide nitrique facilite une séparation et une détermination rapides, sans porteurs, du zirconium et du niobium. Rendement et purité en isotopes 95 Zr et e5 Nb sont normalement supérieurs à 99%.

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“…The anion exchange behaviour of uranium and thorium in various mineral acids on a strong basic anion exchanger has been extensively studied by many investigators [1][2][3][4][5][6][7][8]. First KRAUS et al [1] have presented a reliable procedure for separation of uranium and thorium including protactinium in hydrochloric acid on a strong basic anion exchanger.…”

Section: Introductionmentioning

confidence: 99%

Anion Exchange Behaviour of Thorium, Protactinium, Uranium and Other Elements in Hydrochloric Acid and Acetic Acid Mixture

KlM¹,

Born²

1970

Radiochimica Acta

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The anion exchange behaviour of thorium, protactinium, uranium and other elements representing the alkali, the alkaline earth and the rare earth group has been investigated in various conditions of hydrochloric acid and acetic acid mixture compositions. Adsorption measurements were made at room temperature with the solution composition varying from pure aqueous hydrochloric acid to 90% acetic acid and 10% hydrochloric acid, also changing the acidity of the latter from 1 Ν to 12 Ν within its volume rate of the total solution. The possibility of a simultaneous separation of thorium, protactinium and uranium, also from other elements, has been demonstrated. ZusammenfassungEs wurde das Verhalten von Thorium, Protactinium, Uran und Elementen, die der Alkali, Erdalkali und der Gruppe der seltenen Erden angehören, an Anionenaustauschern unter verschiedenen Bedingungen In Mischungen von Salzsäure und Essigsäure untersucht. Es wurden adsorbierende Messungen bei Zimmertemperatur durchgeführt mit Lösungen, die variieren von reiner Salzsäure bis zu Mischungen von 90% Essigsäure und 10% Salzsäure. Die Möglichkeiten einer gleichzeitigen Trennung von Thorium, Protactinium, Uran und den anderen Elementen wird gezeigt. ResumeOn a etudie le comportement sur echangeurs d'anions du thorium, du protactinium, de l'uranium, d'61ements alcalins, alcalino-terreux et des terres rares, dans diffSrents milieux constitues par des melanges d'acide chlorhydrique et d'acide formique. Des mesures d'adsorption ont 6te eifectuees ä la temperature ambiante, dans des solutions variant de l'acide chlorhydrique pur a un melange contenant 90% d'acide formique et 10% d'acide chlorhydrique. On a demande la possibility d'une separation simultanee du thorium, du protactinium, de l'uranium et d'autres elements.

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Anion Exchange Equilibrations in Phosphoric Acid Solutions

Cited by 26 publications

References 11 publications

The Radiochemistry of the Rare Earths, Scandium, Yttrium, and Actinium

The Radiochemistry of the Rare Earths, Scandium, Yttrium, and Actinium

The Separation of ⁹⁵Zr and ⁹⁵Nb from Irradiated Uranium by Silica Gel Adsorption

Anion Exchange Behaviour of Thorium, Protactinium, Uranium and Other Elements in Hydrochloric Acid and Acetic Acid Mixture

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Anion Exchange Equilibrations in Phosphoric Acid Solutions

Cited by 26 publications

References 11 publications

The Radiochemistry of the Rare Earths, Scandium, Yttrium, and Actinium

The Radiochemistry of the Rare Earths, Scandium, Yttrium, and Actinium

The Separation of 95Zr and 95Nb from Irradiated Uranium by Silica Gel Adsorption

Anion Exchange Behaviour of Thorium, Protactinium, Uranium and Other Elements in Hydrochloric Acid and Acetic Acid Mixture

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The Separation of ⁹⁵Zr and ⁹⁵Nb from Irradiated Uranium by Silica Gel Adsorption