Recovery of alumina trihydrate during the Bayer process using scleroglucan
US8394290B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Aug 15, 2012 |
| Grant date | Mar 12, 2013 |
| Priority date | — |
| Expiry date | Aug 15, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01F7/148
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention provides methods and compositions for improving the production of alumina. The invention involves adding a product containing one or more polysaccharides to liquor within the fluid circuit of the production process, where one of the polysaccharides is scleroglucan. The use of scleroglucan 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.