Process for the recovery of values from secondary aluminum dross
US5198200A · kind A · utility
5Cited by
16References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1991 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Sep 9, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for the recovery of metallic aluminum, mixtures of salts, and an aluminum oxide-metallic aluminum product from secondary aluminum dross. The process includes treating the dross with leach water to dissolve the salt content. Magnesium chloride is preferably added to the leach water to maintain the pH in the range of about 7-8.5, thereby reducing ammonia production in the treating step and enhancing recovery of metallic aluminum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.