Thiacrown polymers for removal of mercury from waste streams
US6696576B2 · kind B2 · utility
21Cited by
3References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2002 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | Feb 1, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/914
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Thiacrown polymers immobilized to a polystyrene-divinylbenzene matrix react with Hg2+ under a variety of conditions to efficiently and selectively remove Hg2+ ions from acidic aqueous solutions, even in the presence of a variety of other metal ions. The mercury can be recovered and the polymer regenerated. This mercury removal method has utility in the treatment of industrial wastewater, where a selective and cost-effective removal process is required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.