公开(公告)号：EP2356098A1

公开(公告)日：2011-08-17

申请号：EP09744694.2

申请日：2009-11-05

Applicant: BASF SE

Inventor： WINDECKER, Gunther ,  WEIGUNY, Jens ,  WECK, Alexander ,  DAHLHOFF, Ellen ,  FREYBERGER, Ralf

IPC: C07D307/08

CPC classification number: C07D307/08

Abstract: The present invention provides a process for preparing tetrahydrofuran by absorption of C
4 dicarboxylic acids and/or derivatives thereof from a crude-product mixture into an organic solvent or water as absorbent, separation of the absorbent, catalytic hydrogenation of the resulting C
4 dicarboxylic acids and/or derivatives thereof, and distillation of the crude, water-containing tetrahydrofuran in at least one distillation column, wherein THF-containing waste streams from the distillation are subjected to catalytic hydrogenation with complete or partial recycling into the process.