Purification method for producing high purity niobium compound and/or tantalum compound
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United States of America Patent
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May 8, 2007
Grant Date -
Jun 2, 2005
app pub date -
Feb 27, 2003
filing date -
Feb 27, 2002
priority date (Note) -
Expired
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Abstract
An object of the present invention is to provide a method for purifying a highly pure niobium compound and/or tantalum compound, the method enabling the purification of a highly pure niobium compound and tantalum compound in a simplified manner at a low cost. The object is met by providing a method comprising adding an organic solvent to an aqueous solution containing a niobium compound and/or tantalum compound together with impurities, and then performing extraction via the solution. A niobium compound and/or tantalum compound dissolved in a solution is allowed to precipitate, and said aqueous solution is obtained by dissolving the precipitate in water.
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