Recovery of alumina from bauxite
US5008089A · kind A · utility
43Cited by
12References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1989 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Oct 13, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01F7/0653
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Red mud in Bayer process liquors are flocculated using dextran and synthetic anionic polymer in the same stage, usually added separately to the liquor. The liquor may be the primary settler slurry, the secondary clarification liquor or one or more of the red mud washing stages. The process is of particular advantage where the liquors are high in carbonate content and/or total alkalinity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.