Colloidal silica/polyelectrolyte blends for natural water clarification
US5667697A · kind A · utility
8Cited by
11References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1996 |
| Grant date | Sep 16, 1997 |
| Priority date | — |
| Expiry date | Aug 21, 2016 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/68
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to the clarification of natural waters containing turbidity-causing components. This method comprises the addition of a stable colloidal silica suspension and water based polymeric coagulant to the turbid water. The components of the invention may be added independently, or blended together so that addition is simultaneous. The colloidal silica may also be conditioned by passing over a cationic exchange resin prior to addition of cationic polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.