Process for the preparation of polyalkenyl succinic anhydrides
US7897696B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2007 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | Dec 31, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2030/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A polyalkenyl succinic anhydride is prepared with low amounts of resinous or chlorinated byproducts in a two-step process whereby a polyalkene is first reacted with an unsaturated organic acid in a thermal ene reaction, followed with exposure to a gaseous halogen in presence of an additional amount of the unsaturated organic acidic reagent. The foregoing process produces a polyisobutenyl succinic anhydride having a high ratio of succinic anhydride functional groups to polyisobutenyl backbone groups. Such a polyisobutenyl succinic anhydride is particular suitable for the production of oil-soluble hydrocarbyl succinimides that have good dispersant properties when added to lubricating oil compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.