Alkaline-permanganate process
US5278743A · kind A · utility
5Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1992 |
| Grant date | Jan 11, 1994 |
| Priority date | — |
| Expiry date | Nov 20, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21F9/004
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An alkaline-permanganate process for chemically decontaminating oxidized metal surfaces wetted by primary water circulating in cooling loops of nuclear reactors maintains permanganate-containing primary water at a temperature of about 90.degree. C. and at a pH of 9-12 to oxidize the wetted surfaces. Oxalic acid is then added to the water and the oxalic acid-containing primary water is maintained at a temperature of at least about 90.degree. C. and at a pH of about 5-7 while it is circulated to destroy the permanganate ions and manganese dioxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.