Method of removing hydroperoxides from lubricating oils using sodium hydroxide and a metal thiophosphate
US5209839A · kind A · utility
4Cited by
1References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1992 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | Mar 5, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M177/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
NaOH can be used to remove hydroperoxides from a lubricating oil provided the oil contains a metal thiophosphate. This extends the useful life of the oil and the equipment being lubricated. In a preferred embodiment, the NaOH is immobilized within the lubrication system of an internal combustion engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.