Methods and compositions for removing contaminants from wastewater streams
US11155479B2 · kind B2 · utility
0Cited by
8References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2019 |
| Grant date | Oct 26, 2021 |
| Priority date | — |
| Expiry date | Nov 26, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/365
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A chemically modified polysaccharide additive may be introduced to a wastewater stream in an effective amount to remove oil-coated particulates and/or heavy metal contaminants from the wastewater stream. The chemically modified polysaccharide includes at least one sulfur-containing moiety and/or nitrogen-containing moiety and the contaminants may be removed by using this chemically modified polysaccharide to capture the contaminants and separating out the captured contaminants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.