Recovery of alumina trihydrate during the bayer process using cross-linked polysaccharides
US8298508B2 · kind B2 · utility
15Cited by
14References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2010 |
| Grant date | Oct 30, 2012 |
| Priority date | — |
| Expiry date | Aug 9, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01F7/47
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention provides methods and compositions for improving the production of alumina hydrate. The invention involves adding one or more polysaccharides to liquor or slurry in the fluid circuit of the production process. The one or more polysaccharides can be a cross-linked polysaccharide (such as cross-linked dextran or cross-linked dihydroxypropyl cellulose). The various polysaccharides can impart a number of advantages including at least some of: greater flocculation effectiveness, increasing the maximum effective dosage, faster settling rate. The production process can be a Bayer process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.