Methods for sludge dewatering
US5720887A · kind A · utility
7Cited by
15References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1996 |
| Grant date | Feb 24, 1998 |
| Priority date | — |
| Expiry date | Nov 21, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/56
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention provides a method for dewatering sludge that utilizes the step-wise and sequential addition to the sludge of a cationic polyamine and a cationic polyacrylamide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.