Method of removing colorants from wastewater
US6059978A · kind A · utility
10Cited by
15References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 6, 1998 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | May 6, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/917
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Cationic polymers are added to wastewater containing colorants to form a cationic polymer/colorant complex. Anionic polymers are then added to the wastewater to produce a flocculent precipitate that is separated from the wastewater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.