Process for the preparation of alpha-oxoaldehydes
US6313343A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2000 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Jan 7, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/39
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Alkylene glycol is oxidized in a vapor phase in the presence of alcohol (a), oxygen, and a catalyst (a) (primary reaction). .alpha.-oxoaldehyde, and alcohol (b) or olefin, are oxidized in a vapor phase in the presence of oxygen and a catalyst (b) (secondary reaction). A molar ratio of the alkylene glycol to the alcohol (a) is preferably in a range of 1/100 to 5/1. It is preferable that one same compound is used as the alcohol (a) and the alcohol (b). In the case where the primary and secondary reactions are successively executed, a reaction device in which a primary reactor and a secondary reactor are connected in a two-stage connection type is preferably used. This ensures that a method is provided that is capable of producing .alpha.-oxoaldehyde at a higher yield than conventionally, and further, that is capable of stably obtaining an .alpha.-oxoaldehyde solution or gas with a higher concentration than conventionally.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.