Methods for treating wastewater
US5368744A · kind A · utility
7Cited by
11References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1993 |
| Grant date | Nov 29, 1994 |
| Priority date | — |
| Expiry date | Aug 3, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L53/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for the flocculation of wastewater comprising a block copolymer having the formula: ##STR1## wherein E is a polymeric segment obtained from the polymerization of hydrophobic monomers, x when present is a nonionic monomer, y is a cationic monomer, R.sub.1 and R.sub.2 are the same or different and are H or a lower alkyl group from C.sub.1 to C.sub.3 and F is a salt of a ammonium cation. The block copolymer is added to the wastewater particularly oily wastewater, to flocculate contaminants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.