Chemically-impregnated silicate agents for mercury control
US7048781B1 · kind B1 · utility
40Cited by
240References
69Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 7, 2003 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | Mar 30, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S95/90
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention is directed to a contaminant removal agent comprising a polyvalent metal sulfide on the surface of an inert substrate. The substrate can be a layered silicate, such as vermiculite, an aluminosilicate such as montmorillonite, or a nonlayered silicate such as a zeolite. The agent removes mercury from process streams. The ion exchange to deposit the polyvalent metal on the substrate is preferably performed at a pH above the pHZPC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.