Coproduction of butanediol and tetrahydrofuran and their subsequent separation from the reaction product mixture
US4656297A · kind A · utility
10Cited by
12References
13Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 18, 1986 |
| Grant date | Apr 7, 1987 |
| Priority date | — |
| Expiry date | Feb 18, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J23/868
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Mixtures of tetrahydrofuran and 1,4-butanediol at a predetermined mole ratio are produced by the hydrogenation of dimethylsuccinate in the presence of a copper chromite catalyst wherein said ratio is controlled by conducting the hydrogenation within a particular temperature range. Methanol is added to the ester feed to increase conversion and reduce transesterification. Tetrahydrofuran and 1,4-butanediol are separated from a mixture which also contains water and methanol by a series of distillations including a superatmospheric distillation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.