Vapor-phase hydrogenation of maleic anhydride to tetrahydrofuran and gamma-butyrolactone
US5072009A · kind A · utility
10Cited by
1References
13Claims
0Family size
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Key dates
| Filing date | Aug 30, 1990 |
| Grant date | Dec 10, 1991 |
| Priority date | — |
| Expiry date | Aug 30, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D307/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Tetrahydrofuran and optionally gamma-butyrolactone are prepared from at least one of maleic anhydride or succinic anhydride in the absence of alcohols by catalytically hydrogenating vaporous maleic anhydride or vaporous succinic anhydride in the presence of hydrogen and a catalyst comprising the mixed oxides of copper, zinc and aluminum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.