Process for the preparation of acetic anhydride
US4609504A · kind A · utility
5Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1981 |
| Grant date | Sep 2, 1986 |
| Priority date | — |
| Expiry date | Dec 17, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/56
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for the preparation of acetic anhydride by carbonylation. In the process, carbon monoxide is reacted with methyl acetate in an anhydrous medium, in the liquid phase, in the presence of an effective amount of nickel, methyl iodide, a quaternary ammonium or quaternary phosphonium iodide and a lithium salt, the reaction medium initially containing acetic anhydride, if desired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.