Selenium removal method
US7282152B2 · kind B2 · utility
3Cited by
9References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 10, 2003 |
| Grant date | Oct 16, 2007 |
| Priority date | — |
| Expiry date | Oct 27, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/912
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides a method for removing selenium from an aqueous stream by passing the aqueous stream, in combination with a quaternary amine compound, through a filter and recovering a treated aqueous stream which is depleted in selenium content relative to the untreated aqueous stream. The present method removes selenium from an aqueous refinery stream by passing the aqueous stream, in combination with a quaternary amine compound, through a filter that can include clay, cellulose, starch, activated carbon, and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.