Method for producing metal fluoride materials

C - Chemistry – Metallurgy – 01 – B

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C01B 9/08 (2006.01) B01J 27/12 (2006.01) B01J 35/00 (2006.01) C01B 7/03 (2006.01) C01G 1/06 (2006.01) C01G 49/10 (2006.01)

Patent

CA 2513386

A method of producing nano metal fluoride powders comprising the steps of mixing an aqueous or organic continuous phase comprising at least one metal cation salt with a hydrophilic or organic polymeric disperse phase forming a metal cation salt/polymer gel and then treating said gel with anhydrous hydrofluoric acid to convert said metal cation salt to metal cation fluoride and heat treating the gel at a temperature sufficient to drive off water and/or organics within the gel, leaving a residue of nano-size metal fluoride powder.

Procédé servant à produire des poudres fluorurées nanométalliques et consistant à mélanger une phase continue organique ou aqueuse contenant au moins un sel cationique métallique avec une phase dispersée polymère hydrophile ou organique, ce qui permet d'obtenir un gel constitué par le sel cationique métallique et le polymère, puis à traiter ledit gel avec de l'acide fluorhydrique anhydre afin de convertir ledit sel cationique métallique en fluorure cationique métallique et à soumettre ce gel à un traitement thermique à une température suffisante pour en extraire l'eau et/ou les éléments organiques, de manière à laisser un résidu de poudre fluorurée métallique de nanodimension.

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