RECOVERY METHOD OF TANTALUM COMPOUND AND/OR NIOBIUM COMPOUND

PROBLEM TO BE SOLVED: To recover a highly pure tantalum metal and/or niobium compound from a by-product mixed salt and/or its solution containing at least either sodium fluoride or potassium fluoride and at least one compound selected from among tantalum compounds and niobium compounds. SOLUTION: In...

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Bibliographische Detailangaben
Hauptverfasser:	KIKUYAMA HIROHISA, WAKI MASAHIDE, YAZAKI YOJI, AOKI KENJI, MIYAMOTO KAZUHIRO, IZUMI HIROTO, MAEDA YUICHIRO, HASHIGUCHI SHINJI
Format:	Patent
Sprache:	eng
Schlagworte:	AMMONIA CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS COMPOUNDS THEREOF CYANOGEN INORGANIC CHEMISTRY METALLURGY
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To recover a highly pure tantalum metal and/or niobium compound from a by-product mixed salt and/or its solution containing at least either sodium fluoride or potassium fluoride and at least one compound selected from among tantalum compounds and niobium compounds. SOLUTION: In a method for recovering the tantalum compound and/or the niobium compound, an ammonia compound and/or a hydrazine compound is added to the by-product mixed salt and/or its solution, followed by solid-liquid separation. The tantalum compound and/or the niobium compound is recovered as tantalum hydroxide and/or niobium hydroxide in a high yield. COPYRIGHT: (C)2004,JPO&NCIPI