Winning metal from ore
US4518420A · kind A · utility
0Cited by
3References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1984 |
| Grant date | May 21, 1985 |
| Priority date | — |
| Expiry date | Jan 19, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Copper is won from chalcopyrite ore (copper/iron sulphide) containing Cu(II) and Fe(III), which respectively prefer square planar and octahedral co-ordination. A vaporized tetradentate (square-planar) Schiff base reagent is passed through a fluidized bed of oxidatively roasted chalcopyrite, and ignores the iron but forms a (volatile) copper complex. This is blown to a decomposition chamber containing a hot probe on which the complex decomposes, leaving the desired copper on the probe and liberating the Schiff base reagent for recycling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.