Method of controlling oxalate precipitation in bayer process liquor
US6293973A · kind A · utility
6Cited by
7References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1998 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | Jul 22, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01F7/473
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method is disclosed for controlling the precipitation of soluble sodium oxalate in Bayer process liquor which comprises adding a surface active quaternary ammonium compound to the Bayer process liquor and then subsequently adding a mixture of a hydrophobic oil and at least one surfactant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.