Method for recovering copper
US5670035A · kind A · utility
22Cited by
11References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1995 |
| Grant date | Sep 23, 1997 |
| Priority date | — |
| Expiry date | Jun 6, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An improved process is described for the recovery of copper from an aqueous feed solution using solvent extraction and electrowinning in which the electrowinning is conducted in a first step wherein the electrolyte is flowing perpendicular to the cathode surface without auxiliary mixing of the electrolyte between electrodes, and a second step wherein the electrolyte is flowing parallel to the cathode surface. In a second embodiment, solvent extraction of copper and solvent extraction of acid are conducted in alternate steps to allow more complete recovery of copper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.