Process for recovering metal values by dissolving them in a sulfuric acid solution containing a carbon source and a reducing agent
US6843970B1 · kind B1 · utility
16Cited by
42References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 26, 1996 |
| Grant date | Jan 18, 2005 |
| Priority date | — |
| Expiry date | Mar 26, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for recovering metal values from a metal containing material including the metal values comprising digesting the metal containing material in a sulfuric acid solution comprising sulfuric acid, a reducing agent, and a carbon source, heating the digestion mixture and separating the resulting solution from the remaining solids. The sulfuric acid solution may additionally include hydrofluoric acid (HF) as a source of fluoride ion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.