Solubility of fluorides of certain elements in liquid uranium hexafluoride

Nikolaev, N. S.; Sadikova, A.T.

doi:10.1007/bf01126362

Cited by 3 publications

(1 citation statement)

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“…Pollutants originate from both uranium ore, the chemical agents used in the conversion process, and/or the fission products of spent uranium. All these elements are fluorinated during the synthesis of UF 6 and their volatility and solubility in UF 6 vary depending on the element [5]. When the volatility of the impurity is close to that of UF 6 , its removal is complicated.…”

Section: Introductionmentioning

confidence: 99%

Selective Chemical Filters for VOF3: Tailoring MgF2 Filter Selectivity through Surface Chemistry

Jouffret,

Hiltbrunner,

Petit

et al. 2023

Surfaces

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In order to synthesize chemical filters for the selective removal of volatile fluorides, commercial magnesium fluoride MgF2 with high specific surface area (HSA) was investigated. The amount of -OH groups substituting fluorine is not negligible, partly due to the high surface area, but also due to the synthesis route. These hydroxyl groups induce a Lewis basicity on the surface of metal fluorides. The amount of these Lewis basic sites has been tailored using fluorination with F2 gas. The sorption of VOF3, used as model gas, onto these fluorides was investigated. The versatility of surface chemistry as a function of a number of Lewis basic sites opens the way to filter selectivity mixture of volatile fluorides depending on their Lewis acidity. HSA MgF2 acts as a stable matrix towards the gas to be purified, and the selectivity may be achieved by a higher Lewis acidity of the gaseous impurity.

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Section: Introductionmentioning

confidence: 99%

Selective Chemical Filters for VOF3: Tailoring MgF2 Filter Selectivity through Surface Chemistry

Jouffret,

Hiltbrunner,

Petit

et al. 2023

Surfaces

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Surface reactivity of uranium hexafluoride (UF6)

Morel

Selmi

Moch

et al. 2018

Comptes Rendus. Chimie

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The present article reviews a selection of results obtained in the AREVA/CNRS/UCA joint research laboratory. It focuses on interfaces formed by uranium hexafluoride (UF 6 ) with chemical filter (purification), carbon (UF 6 storage), and metallic substrate (corrosion). As a matter of fact, along the nuclear fuel cycle, metallic surfaces of the fluorination reactors, cooling systems (for the liquefaction of UF 6 ), and storage containers are in contact with UF 6 , either in the gas or in the liquid phase. For the removal of volatile impurities before the enrichment, surface of chemical filters with a high specific surface area must be enhanced for both selectivity and efficiency. To store depleted UF 6 ( 238 U), graphite intercalation compounds are proposed and preliminary results are presented.

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Lanthanide, Yttrium, and Scandium Trihalides: Preparation of Anhydrous Materials and Solution Thermochemistry

Burgess¹,

Kijowski²

1981

Advances in Inorganic Chemistry and Radiochemistry

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Solubility of fluorides of certain elements in liquid uranium hexafluoride

Cited by 3 publications

References 1 publication

Selective Chemical Filters for VOF3: Tailoring MgF2 Filter Selectivity through Surface Chemistry

Selective Chemical Filters for VOF3: Tailoring MgF2 Filter Selectivity through Surface Chemistry

Surface reactivity of uranium hexafluoride (UF6)

Lanthanide, Yttrium, and Scandium Trihalides: Preparation of Anhydrous Materials and Solution Thermochemistry

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