Polymer flocculants with improved dewatering characteristics
US6667374B2 · kind B2 · utility
18Cited by
15References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2002 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Mar 13, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A high molecular weight water soluble acrylamide based polymer having improved flocculating and dewatering properties is provided. The polymer is prepared by a process in which a small quantity of a chain branching agent is added to the polymerization reaction mixture continuously or stepwise while the monomers are polymerized. The polymer is useful in solid/liquid separations such as flocculants and coagulants in wastewater treatment applications, and as thickening agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.