Cationic polymers for sludge dewatering
US5137641A · kind A · utility
7Cited by
9References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1991 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Mar 4, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/54
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Water-in-oil emulsion polymers of cationic acrylamides to which are added small quantities of chain transfer agents. These polymers are useful as flocculants in sludge dewatering processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.