Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group vb metal
Patent
1989-07-20
1990-12-18
Andrews, Melvyn J.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group vb metal
423 67, 423321R, C01G 3102
Patent
active
049785117
ABSTRACT:
Vanadium is selectively recovered from vanadium-containing phosphoric acid solutions also containing metals other than vanadium by selectively converting the dissolved vanadium to a vanadate compound insoluble in the phosphoric acid solution and separating the resulting insoluble vanadate compound, free of other metal compounds, from the phosphoric acid solution. The dissolved vanadium can be converted to an insoluble vanadate by reaction with oxidants and/or cations which form phosphoric acid-insoluble vanadates. These methods can be employed to selectively recover vanadium from phosphoric acid solutions containing other metals. They also can be employed to recover vanadium compounds from ores, scrap metal, and other vanadium sources by dissolving the vanadium from the vanadium source in phosphoric acid and recovering the vanadium as an insoluble compound from the phosphoric acid as described. Alternatively, the vanadium can be dissolved in a strong acid other than phosphoric acid, and sufficient phosphoric acid can be added to the resulting solution to ensure selective precipitation of impurity-free vanadates by the procedure described above.
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Andrews Melvyn J.
Laird Michael H.
Union Oil Company of California
Wirzbicki Gregory F.
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