Water treatment
US11014831B2 · kind B2 · utility
1Cited by
1References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 2016 |
| Grant date | May 25, 2021 |
| Priority date | — |
| Expiry date | Jan 10, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2305/08
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention concerns a process for removing metal ions from waste water, which process comprises providing plant-derived anionic nanofibrillar cellulose, carrying out a purification treatment comprising sorption of positively charged metal ions contained in the waste water to said nanofibrillar cellulose, separating used plant-derived anionic nanofibrillar cellulose from the waste water, and recovering treated waste water. The invention also concerns use of plant-derived anionic nanofibrillar cellulose for removing metal ions from waste water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.