Method for production of maleimides
US4851547A · kind A · utility
9Cited by
7References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1988 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Dec 23, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D207/448
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for the production of a maleimide by dehydration and ring-closure of maleinamic acid obtained by the reaction of maleic anhydride with an amine, which method is characterized by effecting ring-closure imidation of said maleinamic acid by heating said maleinamic acid in a water-insoluble or water-immiscible inert organic non-polar solvent in the presence of a catalyst of an amine salt produced from the amine and an acid, a mixture of the amine salt and the acid, or a supported catalyst on a solid carrier the catalyst or the acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.