Flocculation of mineral suspensions
US6979405B2 · kind B2 · utility
13Cited by
9References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 16, 2001 |
| Grant date | Dec 27, 2005 |
| Priority date | — |
| Expiry date | Dec 31, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/907
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of dewatering an aqueous mineral suspension comprising introducing into the suspension a flocculating system comprising, a) a substantially non-ionic polymeric flocculant and b) an anionic polymeric flocculant, characterised in that, the substantially non-ionic polymeric flocculant is added to the suspension before the addition of the anionic polymeric flocculant. The method is useful for flocculating China clay suspensions, suspensions of s welling clays, calcium carbonate suspensions, titanium dioxide suspensions, suspensions of coal tailings, red mud and phosphate slimes etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.