Selective recovery of dissolved metals and preparation of metal salt products
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United States of America Patent
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Mar 21, 1995
Grant Date -
N/A
app pub date -
Oct 15, 1992
filing date -
Oct 15, 1992
priority date (Note) -
Expired
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Abstract
Discussed is a process for recovering metals and metal-containing products, such as a nickel sulfate product, from aqueous feed solutions comprising two or more dissolved metals. A selected metal is isolated and in a purified form in an aqueous raffinate phase from solvent extraction of nonselected metals using an organic phase containing a salt of an organic acid and the selected metal. Aqueous feed solution may result from leaching operations, including leaching of nickel-containing catalyst, such as catalyst used in hydrogenation of vegetable oils.
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