C - Chemistry – Metallurgy – 01 – G
Patent
C - Chemistry, Metallurgy
01
G
C01G 35/00 (2006.01) B22F 9/18 (2006.01) C01G 33/00 (2006.01) C22B 5/04 (2006.01) C22B 5/18 (2006.01) C22B 34/24 (2006.01) C22C 1/04 (2006.01)
Patent
CA 2406932
A method of manufacturing niobium and/or tantalum powder consisting of: a first-stage reduction process of reducing niobium and/or tantalum oxides with alkali metals and/or alkaline-earth metals to obtain low-grade oxide powder represented by (Nuba) Ox, where x = 0.06 to 0.35, a process of removing the oxide of alkali metals and/or alkaline-earth metals generated in the first- stage reduction process, and a second-stage reduction process of reducing the low-grade oxide powder obtained in the first-stage reduction process, with a melt solution of alkali metals and alkaline-earth metals to obtain niobium and/or tantalum powder.
Komukai Tetsufumi
Osako Toshiyuki
Smart & Biggar
Sumitomo Metal Mining Co. Ltd.
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