Waste oil decontamination process
US5516969A · kind A · utility
20Cited by
20References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1995 |
| Grant date | May 14, 1996 |
| Priority date | — |
| Expiry date | Jan 23, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21F9/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Heavy metals are removed from waste lubricating oil by heating in the presence of an oxidation catalyst and a free radical initiator at temperatures in the range of about 150.degree.-200.degree. C. Corrosion and oxidation inhibitors previously added to the oil are thereby oxidized to form a separable sludge which contains the bulk of heavy metal contamination. The process is of particular advantage in removing contaminating radioactive nuclides from lubricating oils used in nuclear generating facilities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.