公开(公告)号：DE3861445D1

公开(公告)日：1991-02-07

申请号：DE3861445

申请日：1988-08-04

Applicant: BASF AG

Inventor： PALM CHRISTOF DR ,  HUCHLER OTTO HERMANN DR ,  PESSEL ULRICH-DIETER ,  HOLLBORN ERDMANN ,  SCHMITT DIETER DR

IPC: C07D307/08

Abstract: Crude water-containing tetrahydrofuran is purified by distillation by a process in which the crude tetrahydrofuran is passed through three distillation columns, water being removed from the bottom of the first column, water-containing tetrahydrofuran being recycled from the top of the second column into the first column, the top product of the third column being recycled to the first column, a distillate being removed at the top of the first column, and pure tetrahydrofuran being distilled off from the bottom product of the second column, in the third column, and the pure tetrahydrofuran being removed from the side take-off of the third column.

公开(公告)号：DE19532364A1

公开(公告)日：1997-03-06

申请号：DE19532364

申请日：1995-09-01

Applicant: BASF AG

Inventor： SCHLAEFER DIETER DR ,  ARNDT VOLKER DR ,  MAUS MICHAEL DR ,  SCHMITT DIETER DR

IPC: B01D17/04 ,  B01D17/00 ,  C02F1/28

公开(公告)号：DE3726805A1

公开(公告)日：1989-02-23

申请号：DE3726805

申请日：1987-08-12

Applicant: BASF AG

Inventor： PALM CHRISTOF DR ,  HUCHLER OTTO HERMANN DR ,  PESSEL ULRICH-DIETER ,  HOLLBORN ERDMANN ,  SCHMITT DIETER DR

IPC: C07D307/08

Abstract: Crude water-containing tetrahydrofuran is purified by distillation by a process in which the crude tetrahydrofuran is passed through three distillation columns, water being removed from the bottom of the first column, water-containing tetrahydrofuran being recycled from the top of the second column into the first column, the top product of the third column being recycled to the first column, a distillate being removed at the top of the first column, and pure tetrahydrofuran being distilled off from the bottom product of the second column, in the third column, and the pure tetrahydrofuran being removed from the side take-off of the third column.