Method for the preparation of phenolic acetates and paraformaldehyde
US4237309A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1978 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Nov 3, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The oxidation of methyl benzenes with air or oxygen in the presence of acetic anhydride, benzaldehyde and an acid catalyst under mild reaction conditions yields a phenolic acetate and formaldehyde or paraformaldehyde when the ratio of acetic anhydride to methyl benzene is adjusted to provide the selective formation of the phenolic acetate and formaldehyde or paraformaldehyde. In this process, it is essential that the flow of air or oxygen through the reaction medium be maintained at a sufficient rate to provide for the continuous removal of formaldehyde as it is formed. The formaldehyde may then be recovered in the form of paraformaldehyde.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.