Removal of radioactive or heavy metal contaminants by means of non-persistent complexing agents
US5434331A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1992 |
| Grant date | Jul 18, 1995 |
| Priority date | — |
| Expiry date | Nov 17, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21F9/004
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A process for the decontamination of solid surfaces contaminated with radioactive or heavy metal species using a solution based on one or more non-persistent complexing agents, or for the chemical cleaning of steam generator sludge using such a solution, or for removing radioactive or heavy metal species from a solution using a combination of a one or more non-persistent complexing agents and a solid support, followed in each case by thermal or thermal-chemical treatment to decompose said non-persistent complexing agent. The preferred non-persistent complexing agents are hydroxamic acids, and the most preferred is acetohydroxamic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.