Mannich detergents for hydrocarbon fuels
US7597726B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 20, 2006 |
| Grant date | Oct 6, 2009 |
| Priority date | — |
| Expiry date | Feb 22, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L1/2387
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
New, highly effective Mannich detergents for use in hydrocarbon fuels are described which reduce engine deposits in spark and compression ignition internal combustion engines. They are Mannich condensation reaction products obtained from reacting: (i) a polyamine having a sterically-hindered primary amino group, (ii) a hydrocarbyl-substituted hydroxyaromatic compound, and (iii) an aldehyde. These Mannich detergent compounds may be dispersed in a liquid carrier to provide a fuel additive concentrate for hydrocarbon engine fuels which effectively control engine deposit formation in intake valves and also other engine regions such as port fuel injectors and combustion chambers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.