Methods of removing undesired ions from aqueous solutions
US5158687A · kind A · utility
1Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1991 |
| Grant date | Oct 27, 1992 |
| Priority date | — |
| Expiry date | Jul 11, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/913
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method of removing undesired ions, such as chlorine, hypochlorite, chromium, cyanide and heavy metal ions, from an aqueous preparation containing one or more of said ions consists of adding to the aqueous preparation an effective amount of magnesium bisulfite to inactivate the undesired ions and then adjusting the pH of the mixture to an appropriate pH. Compositions containing magnesium bisulfite and divalent and trivalent ions are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.