Comurhex Societe Pour La Conversion De L'uranium En Metal Et Hexafluorure

Areva Nc

Bertrand Morel

Murielle Rivenet

Mehdi Arab

Francis Abraham

Alain Tressaud

David Amaraggi

Rudy Thomas

Lorraine Leite

Laurent Moch

Alain Demourgues

Romain Clarenc

Etienne Durand

A method to activate UOfor conversion of this uranium oxide to hydrated UOvia reaction with hydrogen peroxide HO, wherein the following successive steps are performed: A method to convert UOto hydrated UOof formula UO, nHO where n is 2 or 4, comprising at least one step at which hydrogen peroxide HOis added to the aqueous suspension of a powder of activated UOobtained at the end of step b) of the activation method or to an aqueous suspension prepared by placing in suspension in water the powder of activated UOobtained at the end of step c) of the activation method.

[object Object]

A method for converting UOand/or UOinto hydrated UOof formula UO.nHO wherein n is 2 or 4, comprising the following successive steps:

The invention relates to the use of a compound of the formula KmgFto trap metals in the form of fluorides and/or of oxyfluorides in a gaseous or liquid phase. It also relates to a compound of the formula KMgFwhich has a surface area at least equal to 30 m/g and at most equal to 150 m/g and also to its methods of preparation. The invention notably finds application in the nuclear industry, in which it can advantageously be used to purify uranium hexafluoride (UF) present in a gaseous or liquid stream, with regard to metal impurities which are also present in this stream.

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Saint Paul Trois Chateaux, France

Bertrand Morel