Preparation of carboxylic acid anhydrides
US4335059A · kind A · utility
10Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 24, 1980 |
| Grant date | Jun 15, 1982 |
| Priority date | — |
| Expiry date | Dec 24, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/847
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A carboxylic acid anhydride, such as acetic anhydride, is prepared from a carboxylate ester or a hydrocarbyl ether in carbonylation processes comprising the use of an iodide, carbon monoxide and a molybdenum-nickel or tungsten-nickel component in the presence of a promoter comprising an organo-phosphorus compound or an organo-nitrogen compound wherein the phosphorus and nitrogen are trivalent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.