Process for producing silicon-containing aromatic polyacids
US4940810A · kind A · utility
4Cited by
1References
6Claims
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Key dates
| Filing date | Dec 15, 1989 |
| Grant date | Jul 10, 1990 |
| Priority date | — |
| Expiry date | Dec 15, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F7/083
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An improved process is disclosed for preparation of silicon-containing aromatic polyacids by liquid phase oxidation of a mono- or polyalkyl substituted diaryldialkylsilane in the presence of oxygen and a catalyst comprising cobalt-manganese-bromine. Bis(p-tolyl)dimethylsilane is oxidized to bis(p-carboxyphenyl)dimethylsilane and bis(3,4-dimethylphenyl)-dimethylsilane is oxidized to bis(3,4-dicarboxylphenyl)dimethylsilane.
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