Removal of carcinogenic hydrocarbons from used lubricating oil using activated carbon
US4977871A · kind A · utility
22Cited by
19References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1988 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Nov 7, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M177/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A system for the substantial removal of polynuclear aromatic compounds from lubricating oil used to lubricate the engine of a motor vehicle comprising a sorbent located within the lubricating system and through which the lubricating oil circulates which is capable of removing substantially all of the polynuclear aromatic hydrocarbons from the lubricating oil. The sorbent is preferably activated carbon which may be impregnated with additives typically found in lubricating oils especially antioxidants, to prolong the useful life of the oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.