Preparation of .alpha., .beta.-unsaturated carboxylic acids and anhydrides
US5710328A · kind A · utility
24Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1995 |
| Grant date | Jan 20, 1998 |
| Priority date | — |
| Expiry date | Nov 27, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2523/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a process for the preparation of .alpha.,.beta.-unsaturated carboxylic acids and anhydrides thereof which comprises contacting formaldehyde or a source of formaldehyde with a carboxylic anhydride in the presence of a catalyst comprising mixed oxides of vanadium, phosphorus and, optionally, a third component selected from titanium, aluminum or, preferably silicon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.