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AssigneeCOMURHEX Societe pour la Conversion de I'Uranium en Metal et Hexafluorure
InventorsBertrand Morel, Lorraine Leite, Laurent Moch, Alain Demourgues, Romain Clarenc, Alain Tressaud, Etienne Durand
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The invention relates to the use of a compound of formula KMgF3 to trap metals present in the form of fluorides and/or of oxyfluorides in a gaseous or liquid phase. It also relates to a compound of formula KMgF3 which has a surface specific area at least equal to 30 m2/g and at most equal to 150 m2/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 (UF6) present in a gaseous or liquid stream, with regard to metal impurities which are also present in this stream.
A process for trapping a metal, the process comprising contacting a KMgF3 compound with a gaseous or liquid phase comprising a metal fluoride and/or a metal oxyfluoride, such that at least a portion of the metal fluoride and/or the metal oxyfluoride is retained by the KMgF3 compound.
3-4. (canceled)
A method for preparing a KMgF3 compound having a surface specific area at least equal to 30 m2/g and at most equal to 150 m2/g, the method comprising:
A method for preparing a KMgF3 compound having a surface specific area at least equal to 30 m2/g and at most equal to 150 m2/g, the method comprising impregnating magnesium difluoride with an aqueous solution comprising potassium bifluoride.
A process for purifying uranium hexafluoride, the process comprising contacting a KMgF3 compound with a gaseous or liquid phase comprising uranium hexafluoride and a different metal fluoride and/or a metal oxyfluoride, such that at least a portion of the different metal fluoride and/or the metal oxyfluoride is retained by the KMgF3 compound.
Dependencies are inferred from the claim text.