公开(公告)号：BR0110477A

公开(公告)日：2003-04-01

申请号：BR0110477

申请日：2001-05-03

Applicant: BASF AG

Inventor： KAIBEL GERD ,  WECK ALEXANDER ,  RANH RALF-THOMAS

IPC: B01D3/14 ,  B01D3/26 ,  C07C27/28 ,  C07C29/80 ,  C07C31/20 ,  C07D307/08 ,  C07D307/33

Abstract: In a process for the continuous fractional distillation of mixtures comprising tetrahydrofuran, gamma-butyrolactone and/or 1,4-butanediol to give at least three fractions, the fractionation is carried out in an assembly of distillation columns comprising at least one dividing wall column or at least one assembly of thermally coupled conventional distillation columns.