Method for inhibiting precipitation of sodium oxalate in a Bayer process liquor
US5902560A · kind A · utility
1Cited by
4References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 28, 1997 |
| Grant date | May 11, 1999 |
| Priority date | — |
| Expiry date | Aug 28, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01F7/145
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A new and improved method for inhibiting the precipitation of sodium oxalate crystals in a Bayer process liquor is provided. In an embodiment, the method comprises the step of adding to the Bayer process liquor, after red mud separation, a minor effective amount of a liquor oxalate stabilizer selected from hydrocarbon-substituted amine oxide compounds and/or hydrocarbon-substituted betaine compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.