Purification method for producing high purity niobium...

Details Purification method for producing high purity niobium... Purification method for producing high purity niobium...

2007-02-13

2007-02-13

Nguyen, Ngoc-Yen (Department: 1754)

Chemistry of inorganic compounds

Halogen or compound thereof

Plural metal or metal and ammonium containing

C423S065000, C423S489000, C423S594170

Reexamination Certificate

active

10505802

ABSTRACT:
The present invention provides a method enabling the high purification of a niobium compound and/or tantalum compound in a simplified manner at a low cost. This is accomplished by providing a method enabling the high purification of a niobium compound and/or tantalum compound comprising the steps of preparing a solution containing niobium and/or tantalum, allowing a precipitate comprising niobium and/or tantalum to develop, separating the precipitate by filtration from the filtrate, converting the precipitate to a liquid melt or taking the filtrate, and separating a niobium compound from a tantalum compound or vice versa by utilizing the difference in solubility to the solvent between the niobium compound and the tantalum compound.

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