Process and catalyst for preparing 1,4-butanediol

US11260375B2 · kind B2 · utility

Assignee

• Evonik Operations GmbH · DE

Inventors

• Monika Berweiler · Maintal, DE
• Markus Göttlinger · Rodenbach, DE
• Meike Roos · Büdingen, DE
• Matthias Schwarz · Flieden, DE
• René Poss · Karlsruhe, DE

Key dates

• Filing date: Sep 27, 2017
• Grant date: Mar 1, 2022
• Expiry date: Dec 11, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C31/207
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing 1,4-butanediol (BDO) by hydrogenating 2-butyne-1,4-diol (BYD) or 4-hydroxybutanal (4-HBA) in the presence of a catalyst of the Raney type having a porous foam structure, wherein the macroscopic pores have sizes in the range of 100 to 5000 μm, and a bulk density of up to 0.8 kg/L.