Wet recycling process for impregnated active carbon by extraction with organic solvent
US6013593A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1998 |
| Grant date | Jan 11, 2000 |
| Priority date | — |
| Expiry date | Mar 19, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J20/3416
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A wet recycling method for impregnated active carbon used to remove radioactive organic iodide in a nuclear power plant by extracting impregnated substance and radioactive organic iodide from the used impregnated active carbon with an acetonitrile solution and reproducing active carbon to be used in preparing impregnated active carbon, the filtered extractive solution being distilled to obtain pure acetonitrile for the use purpose as an extractive solution, the impregnated substance and radioactive organic iodide extracted in a small amount of solid, thus reducing the volume of the waste impregnated active carbon greatly to decrease solid waste material and at the same time recycle materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.