Processes for the recovery of copper from aqueous solutions containing nitrate ions
US6432167B1 · kind B1 · utility
27Cited by
12References
18Claims
0Family size
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Key dates
| Filing date | Jan 11, 2001 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Jan 11, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for the recovery of copper from an aqueous phase containing nitrate ions, in which the aqueous phase is contacted with a solution of an oxime extractant in a water-immiscible organic solvent, which comprises using at least one of the following process variants:I) reducing the acidity of the aqueous phase prior to contact with the organic solution; andII) reducing the electromotive force in the aqueous phase prior to contact with the organic solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.