Alkylation of N′-phenyl-N-alkylphenylenediamines in ionic liquid, N′-phenyl-N-alkyl (alkylphenylene) diamines produced thereby, and lubricant compositions containing same
US7390928B2 · kind B2 · utility
8Cited by
11References
14Claims
0Family size
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Key dates
| Filing date | Dec 14, 2005 |
| Grant date | Jun 24, 2008 |
| Priority date | — |
| Expiry date | May 30, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2070/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for alkylation of a N′-phenyl-N-alkyl-p-phenylenediamine of specified formula in an ionic liquid unexpectedly produces a N′-phenyl-N-alkyl(alkylphenylene)diamine of a second specified formula. The use of an inorganic liquid permits convenient separation of the alkylated reaction product from the reaction mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.