Method of reducing asphaltene precipitation in an engine utilizing a C22 hydrocarbyl salicylate
US8399392B2 · kind B2 · utility
0Cited by
3References
27Claims
0Family size
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Key dates
| Filing date | Sep 10, 2009 |
| Grant date | Mar 19, 2013 |
| Priority date | — |
| Expiry date | Sep 10, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/252
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of reducing asphaltene precipitation or ‘black paint’ in an engine is disclosed. The method includes the step of lubricating the engine with a lubricating oil composition comprising: an oil of lubricating viscosity in a major amount; and, a salicylate detergent system in a minor amount comprising one or more neutral or overbased alkaline earth metal C22 hydrocarbyl substituted salicylates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.