Formylation process for producing aldehydes
US4755613A · kind A · utility
1Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1987 |
| Grant date | Jul 5, 1988 |
| Priority date | — |
| Expiry date | Apr 10, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C45/008
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for preparing aromatic or hetero-aromatic aldehydes by the Reimer-Tiemann formylation reaction. The process comprises employing a solid alkaline hydroxide in order to carry out the reaction in a solid/liquid medium and by adjusting the initial hydration rate of the medium to be higher than 0.05 moles of water per mole of initial compound and less than 1.5 moles of water per mole of alkaline hydroxide initially in the medium. Such a process makes it possible to substantially increase the yield of the Reimer-Tiemann reaction and to avoid tar formation entirely or in large part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.