Removing arsenic from water with acid-activated clay
US11332387B2 · kind B2 · utility
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Key dates
| Filing date | Jun 28, 2019 |
| Grant date | May 17, 2022 |
| Priority date | — |
| Expiry date | May 12, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2101/103
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The description relates to a composition and a method for reducing the concentration of arsenic in water. Contaminated water is contacted with acid-activated clay characterized by a removal efficiency for arsenic of at least 95 wt %. Following sufficient contact, the water is separated from the acid-activated clay. In preferred form, the acid activated clay is characterized by a BET surface area of at least about 200 m2/gram.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.