Process for the preparation of para,para'-polyphenyldicarboxylic acid
US4996353A · kind A · utility
5Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 1989 |
| Grant date | Feb 26, 1991 |
| Priority date | — |
| Expiry date | May 16, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/265
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the preparation of polyphenyl dicarboxylic acids is disclosed. The process comprises contacting para,para'-diisoalkyl or dialkyl-polyphenyl or an oxidation intermediate thereof with oxygen under reaction conditions sufficient to form para,para'-polyphenyldicarboxylic acid. The process is optionally carried out in the presence of cobalt, manganese, and bromine compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.