Adsorbent for anionic substances, production method for adsorbent for anionic substances, production device for adsorbent for anionic substances, and recovering method for anionic substances
US11517893B2 · kind B2 · utility
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Key dates
| Filing date | Feb 24, 2020 |
| Grant date | Dec 6, 2022 |
| Priority date | — |
| Expiry date | Nov 10, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2209/44
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An adsorbent for phosphoric acid-based anionic substances, that contains foamed glass, and that has a Ca2p concentration of 7.5 atom % or more or a Na1s concentration of 5.0 atom % or less at the surface thereof as measured by XPS analysis, and a half-width of Si2p peak of 2.4 eV or more. The adsorbent can also have a specific surface area of 45 m2/g or more or a pore volume of 2.5 cm3/g or more as measured by mercury intrusion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.