Dewatering of aqueous suspensions
US5681480A · kind A · utility
22Cited by
11References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1995 |
| Grant date | Oct 28, 1997 |
| Priority date | — |
| Expiry date | Sep 22, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/928
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A mill waste or deinking waste or other suspension containing cellulosic material and hydrophobic material is flocculated by a cationic polymeric flocculant and the flocculated material, is then aggregated by a swelling clay or other anionic colloidal material, optionally further cationic flocculant is added, and the aggregated material is then separated by belt pressing or other pressure filtration as a cake.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.