Process for producing 4-formyl-4'-methylbiphenyl from biphenyl
US5436374A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1994 |
| Grant date | Jul 25, 1995 |
| Priority date | — |
| Expiry date | Jul 28, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C45/49
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for producing a 4-formyl-4'-methylbiphenyl from a biphenyl which comprises conducting the carbonylation of the biphenyl with carbon monoxide in the presence of a HF-BF.sub.3 catalyst in a carbonylation reactor to obtain the resulting reaction product solution containing a 4-formylbiphenyl, separating the 4-formylbiphenyl from the reaction product solution, hydrogenating the separated 4-formylbiphenyl to obtain a 4-methylbiphenyl, recycling the 4-methylbiphenyl to the carbonylation reactor, and then conducting both the carbonylation of the biphenyl with carbon monoxide to obtain a formylbiphenyl and the carbonylation of the 4-methylbiphenyl with carbon monoxide to obtain a 4-formyl-4'-methylbiphenyl simultaneously in the presence of the HF-BF.sub.3 catalyst in the carbonylation reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.