Teledyne Industries, Inc.

Patrick H Payton

Ralph H Nielsen

A method of extracting high purity columbium oxide, also known as niobium oxide, from barium-rich pyrochlore ores by treating the ore with a calcium salt such as calcium chloride, fusing the ore with caustic soda and a fluorine containing compound, and subsequently acid leaching the fused mass; and from calcium-rich pyrochlore ores by fusing the ore with caustic soda and a fluorine containing compound, and subsequently acid leaching the fused mass. The amount of fluorine containing compound used should contain anywhere from above 2% to about 10% fluorine content by weight relative to the ore.

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Albany, OR, United States of America

Patrick H Payton