Method of stabilizing manganese in aqueous systems
US4941979A · kind A · utility
3Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 8, 1989 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Feb 8, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F5/145
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A process for stabilizing manganese ions in aqueous solutions is disclosed. The process comprises adding to an aqueous solution containing maganese ions a polymer or copolymer of unsaturated carboxylic compounds such as acrylic acid, methacrylic acid, polyacrylic acid and maleic anhydride and an orthophosphate. The ratio of polymer to orthophosphate is preferrably about 2 to 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.