Process for making copper foil
US5366612A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 19, 1993 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Apr 19, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a process for making copper foil from copper-bearing material comprising: PA1 (A) contacting said copper-bearing material with an effective amount of at least one aqueous leaching solution to dissolve copper ions into said leaching solution and form a copper-rich aqueous leaching solution; PA1 (B) contacting said copper-rich aqueous leaching solution with an effective amount of at least one water-insoluble extractant to transfer copper ions from said copper-rich aqueous leaching solution to said extractant to form a copper-rich extractant and a copper-depleted aqueous leaching solution; PA1 (C) separating said copper-rich extractant from said copper-depleted aqueous leaching solution; PA1 (D) contacting said copper-rich extractant with an effective amount of at least one aqueous stripping solution to transfer copper ions from said extractant to said stripping solution to form a copper-rich stripping solution and a copper-depleted extractant; PA1 (E) separating said copper-rich stripping solution from said copper-depleted extractant; PA1 (F) flowing said copper-rich stripping solution between an anode and a rotating cathode, and applying an effective…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.