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US3294482A
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Process for recovering metal chlorides from gaseous mixtures
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US3235328A
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Sulfurous acid leaching and reductive chlorination of high melting metal-containing ores
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US3240557A
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Selective chlorination with elemental chlorine of ores containing high melting metals
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US3212847A
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Reductive chlorination of activated ores containing high melting metals
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US3087809A
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Sulfuric acid leaching of niobium ores
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CA658122A
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Solvent extraction of niobium values
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CA733028A
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Reductive chlorination of nonrefractory ore
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CA751302A
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Method of converting columbium oxychloride to columbium pentachloride
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CA751841A
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Recovering high melting metals from carbonate-containing ores
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CA731535A
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Chlorination process
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CA722111A
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Recovery of normally solid metal chlorides from gaseous mixtures thereof
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CA632793A
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Recovery of niobium from ores
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