Preparation of substituted benzophenones
US4929761A · kind A · utility
1Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1986 |
| Grant date | May 29, 1990 |
| Priority date | — |
| Expiry date | Dec 22, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C45/48
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is disclosed a process for the preparation of a benzophenone, which process comprises contacting a feed comprising an aromatic carboxylic acid in the vapor phase and under suitable conditions with a catalyst which is capable of catalyzing the conversion of an aromatic carboxylic acid to a benzophenone to provide a yield of at least 10% benzophenone and which comprises at least one oxide that is an oxide of an element having an atomic number of at least 60. Typical catalysts are neodymium trioxide and a mixture of thorium dioxide and magnesium oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.