Removal of selenium from water with kaolinite
US11332388B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Aug 21, 2020 |
| Grant date | May 17, 2022 |
| Priority date | — |
| Expiry date | Oct 13, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2101/106
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The description relates to a composition and a method for reducing the concentration of selenium in water. Contaminated water is contacted with a kaolinite clay characterized by a removal efficiency for selenatearsenate of at least 40 wt % at ambient temperature. The adsorption process is fast. Following sufficient contact, the water is separated from the kaolinite clay. In a preferred form, the kaolinite clay has high surface acidity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.