The Extraction of Molybdenum (VI) from Sulfuric Acid Solutions by Tri-Octyl Amine in Benzene

The extraction of molybdenum (VI) from sulfuric acid by TOA (tri-octylamine) in benzene has been investigated in terms of the effects of acid concentration. It was found that the optimum extraction occures in the range of 0.075 to 0.15 mol dm-3 initial aqueous sulfuric acid concentration. Electronic...

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Published inShigen to sozai Vol. 105; no. 3; pp. 245 - 248
Main Authors HOSAKA, Takao, KIKUCHI, Shoji, HATTORI, Hirotomo
Format Journal Article
LanguageJapanese
Published The Mining and Materials Processing Institute of Japan 1989
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ISSN0916-1740
1880-6244
DOI10.2473/shigentosozai.105.245

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Summary:The extraction of molybdenum (VI) from sulfuric acid by TOA (tri-octylamine) in benzene has been investigated in terms of the effects of acid concentration. It was found that the optimum extraction occures in the range of 0.075 to 0.15 mol dm-3 initial aqueous sulfuric acid concentration. Electronic spectra of various sulfuric acid solutions containing molybdenum (VI) was examined. In addition, chemical method and infrared spectrum were used to examine the extracted species. It was suggested that extracted species of molybdenum (VI) formed polymolybdated ion. On the basis of results obtained, it was inferred that molybdenum (VI) was extracted with TOA (R3N) according to the following equation, in high concentration range of the metal. 3 [(R3NH) 2SO4] + (Mo7O24H6)⇔[(R3NH) 6·(Mo7O24H6)·(SO4) 3]
ISSN:0916-1740
1880-6244
DOI:10.2473/shigentosozai.105.245