Metal removal apparatus and method
US4331472A · kind A · utility
7Cited by
8References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 21, 1981 |
| Grant date | May 25, 1982 |
| Priority date | — |
| Expiry date | May 21, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31692
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A first metal is removed from solutions such as polluted water by contacting the solution with a metallic exchange medium. The metallic exchange medium comprises a plurality of buoyant elements, each comprising a substrate coated with a second metal sufficiently reactive to undergo an electrochemical exchange reaction with the first metal. The substrate can be expanded polystyrene beads and the metal can be iron such as sponge iron of small particle size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.