Oxydehydrogenation process for preparing methacrylic acid and its lower alkyl esters
US4410729A · kind A · utility
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3Claims
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Key dates
| Filing date | Apr 26, 1982 |
| Grant date | Oct 18, 1983 |
| Priority date | — |
| Expiry date | Apr 26, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/377
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Isobutyric acid or a lower alkyl ester thereof is oxidatively dehydrogenated in the vapor phase producing the corresponding .alpha.,.beta.-olefinically unsaturated derivative by contact with a heterogeneous catalyst in the presence of molecular oxygen. The catalyst is composed of the calcined phosphates of iron, silver and chromium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.