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US 2018/0002303 A1Published application
Method for producing tetrahydrofurane, 1,4-butanediol or gamma-butyrolactone
AssigneeBASF SE
InventorsAlexander Duefert, Rolf Pinkos, Wolf-Steffen Weissker
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Abstract
Processes for preparing tetrahydrofuran and/or butane-1,4-diol and/or gamma-butyrolactone are provided, including a process for preparing tetrahydrofuran (THF) from succinic acid that has been obtained by conversion of biomass, by conversion of the succinic acid to succinic anhydride, and hydrogenation of the succinic anhydride, with removal of certain secondary components.
Claims15
A process for preparing at least one of tetrahydrofuran, butane-1,4-diol, and gamma-butyrolactone, the process comprising the steps of:
- a) fermentatively preparing succinic acid,
- b) converting the succinic acid to succinic anhydride with elimination of water and removal of water,
- c) converting the succinic anhydride to the gas phase,
- d) removing sulfur compounds from the succinic anhydride by passing the gaseous succinic anhydride through a fixed guard bed that absorbs the sulfur compounds,
- e) hydrogenating the gaseous succinic anhydride in the presence of free hydrogen over a metallic catalyst to give the at least one of tetrahydrofuran, butane-1,4-diol, and gamma-butyrolactone.
2 more elements
Dependencies are inferred from the claim text.