Treatment of degraded oxime metal extractants in process organic solutions
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United States of America Patent
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May 26, 2020
Grant Date -
Mar 15, 2018
app pub date -
Mar 18, 2016
filing date -
Mar 20, 2015
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Abstract
The invention relates to a method for regenerating the extractive potential of an organic hydroxyoxime-based extraction solution used in the recovery of metals by liquid-liquid extraction. The method is two-stage, in which a solid hydroxylamine is used in the reaction stage, and the removal of the undesirable compounds generated in the reaction occurs in the second stage by adsorption purification. The method of the invention is suitable for treatment of degraded oxime metal extractants in various process organic solutions both in aldehyde and ketoxime extractant solutions. The method can also be used to treat a mixture of degraded oxime extractants.
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