Niobium and tantalum pentoxide compounds

C - Chemistry – Metallurgy – 01 – G

Patent

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Details

C01G 35/00 (2006.01) C01G 33/00 (2006.01)

Patent

CA 2234672

A process for producing valve metal oxides, such as tantalum pentoxide or niobium pentoxide with a narrow particle size distribution within a desired particle size range. Valve metal solution from digestion of valve metal material containing ore is processed under controlled temperature, pH, and residence time conditions to produce the valve metal pentoxide and pentoxide hydrates. Also, disclosed are new tantalum pentoxide and niobium pentoxide products and new tantalum pentoxide precursors and niobium pentoxide precursors.

La présente invention concerne un procédé de production d'oxydes métalliques à effet de valve tels que le pentoxyde de tantale et le pentoxyde de niobium, présentant une distribution granulométrique étroite dans les limites d'une plage granulométrique spécifique. Une solution de métal à effet de valve provenant de la digestion d'un minerai contenant du matériau métallique à effet de valve subit un traitement dans des conditions contrôlées de température, de pH et de durée de séjour, de façon à produire le pentoxyde de métal à effet de valve et des hydrates de pentoxyde. L'invention concerne également de nouveaux produits à base de pentoxyde de tantale et de pentoxyde de niobium ainsi que de nouveaux précurseurs du pentoxyde de tantale et du pentoxyde de niobium.

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