Efficient synthesis of methacroelin and other alpha, beta—unsaturated aldehydes from methanol and an aldehyde
US9834501B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2016 |
| Grant date | Dec 5, 2017 |
| Priority date | — |
| Expiry date | Jan 28, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process is described that uses a silver catalyst to convert methanol into formaldehyde in the presence of less than a stoichiometric amount of oxygen. The resulting formaldehyde is reacted without isolation with propionaldehyde over a commercially available anatase titania catalyst that is shown to be catalytically active towards the formation of methacrolein from formaldehyde and propionaldehyde with conversions and selectivities close to 90%. This titania catalyst is readily available, non-toxic, and can be used with formaldehyde and a variety of other aldehyde compounds to make α,β-unsaturated aldehyde compounds. This process benefits from low raw material costs and is economically advantaged due to the elimination of catalyst separation. This process shows promising stability and selectivity during lifetime studies, particularly when performed in the presence of a hydrogen carrier gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.