Water continuous methyl acrylate emulsion polymers for improved flocculation of red mud in the Bayer process
US6036869A · kind A · utility
14Cited by
26References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1997 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Dec 12, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/56
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for improving the flocculation of suspended solids in a Bayer process liquor in a primary settler stage. The method includes the step of adding to a primary settler feed a composition including water-continuous polymer, said polymer being hydrolyzable in a Bayer process liquor to an acid form, said acid form being an active red mud flocculent. A novel emulsion, and a polymerization technique for obtaining high molecular weight emulsions are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.