Heavy metal collection system
US8002980B2 · kind B2 · utility
0Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2008 |
| Grant date | Aug 23, 2011 |
| Priority date | — |
| Expiry date | Nov 18, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2101/20
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A former (11) works, when supplied with wastewater containing heavy metals and hydrogen sulfide, to react heavy metals contained in wastewater with hydrogen sulfide to form sulfide salts, an acquirer (12) works, when supplied with sulfide salts and acid, to acquire hydrogen sulfide and heavy metal ions produced by reactions between sulfide salts and acid, a hydrogen sulfide supply line (13) supplies hydrogen sulfide acquired by the acquirer to the former, and a collection line (20) collects heavy metal ions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.