公开(公告)号：DE59904662D1

公开(公告)日：2003-04-24

申请号：DE59904662

申请日：1999-09-21

Applicant: BASF AG

Inventor： ADRIAN TILL ,  BESSLING BERND ,  HASSE HANS ,  VANSANT FRANS ,  THEIS GERHARD

IPC: C07C29/10 ,  C07C29/76 ,  C07C29/80 ,  C07C31/20

Abstract: A process for the distillative recovery of high purity monoethylene glycol from the hydrolysis product of ethylene oxide by pressure dewatering, vacuum dewatering and subsequent purifying distillation, which includes the pressure dewatering columns or at least the first pressure dewatering column of the battery (2, 3, 4) having a stripping section with at least one separating stage, preferably with from 2 to 10 separating stages, particularly preferably with from 3 to 6 stages, and a portion of the overhead stream of the pressure dewatering column(s) (2, 3, 4) having a stripping section being removed from the system.

公开(公告)号：AT234799T

公开(公告)日：2003-04-15

申请号：AT99952457

申请日：1999-09-21

Applicant: BASF AG

Inventor： ADRIAN TILL ,  BESSLING BERND ,  HASSE HANS ,  VANSANT FRANS ,  THEIS GERHARD

IPC: C07C29/10 ,  C07C29/76 ,  C07C29/80 ,  C07C31/20

Abstract: A process for the distillative recovery of high purity monoethylene glycol from the hydrolysis product of ethylene oxide by pressure dewatering, vacuum dewatering and subsequent purifying distillation, which includes the pressure dewatering columns or at least the first pressure dewatering column of the battery (2, 3, 4) having a stripping section with at least one separating stage, preferably with from 2 to 10 separating stages, particularly preferably with from 3 to 6 stages, and a portion of the overhead stream of the pressure dewatering column(s) (2, 3, 4) having a stripping section being removed from the system.

公开(公告)号：NO20023514A

公开(公告)日：2002-08-22

申请号：NO20023514

申请日：2002-07-23

Applicant: BASF AG

Inventor： AUER HEINZ ,  BESSLING BERND ,  HAMMER HANS ,  HASSE HANS ,  SAUER FRIEDRICH ,  VICARI MAXIMILIAN ,  ADRIAN TILL

IPC: C07C51/09 ,  C07C51/44 ,  C07C51/48 ,  C07C53/02 ,  C07C

CPC classification number: C07C51/44 ,  C07C51/09 ,  C07C51/48 ,  C07C53/02

公开(公告)号：NO20023481L

公开(公告)日：2002-08-21

申请号：NO20023481

申请日：2002-07-22

Applicant: BASF AG

Inventor： AUER HEINZ ,  BESSLING BERND ,  HAMMER HANS ,  HASSE HANS ,  SAUER FRIEDRICH ,  VICARI MAXIMILIAN ,  ADRIAN TILL

IPC: B01J14/00 ,  C07C27/02 ,  C07C51/09 ,  C07C51/44 ,  C07C51/48 ,  C07C53/02 ,  C07C

Abstract: The invention relates to a process for obtaining anhydrous or substantially anhydrous formic acid, in which firstly aqueous formic acid is prepared by hydrolysis of methyl formate and is freed from water in the subsequent work-up. The process has the special feature that steam, which is employed for the hydrolysis of methyl formate and for heating a distillation column serving for work-up, is also used as stripping steam for waste-water stripping. The stripped waste water is produced during work-up.

公开(公告)号：CA2408325A1

公开(公告)日：2001-11-07

申请号：CA2408325

申请日：2001-05-09

Applicant: BASF AG

Inventor： MEYER GERALD ,  PICKENACKER KARIN ,  PAHL MELANIE ,  HILL THOMAS ,  ADRIAN TILL ,  KAIBEL GERD ,  KINDLER KLAUS ,  BOHNER GERD

IPC: C07C7/08 ,  B01D3/14 ,  B01D3/40 ,  C07C5/09 ,  C07C7/00 ,  C07C11/167 ,  C10G7/08 ,  C10G70/00 ,  C10G70/02 ,  C07C7/163

Abstract: The invention relates to a method for treating a C4 fraction, comprising the following steps: extractive distillation (I), selective hydrogenation on a heterogeneous catalyst (II), a stream of crude 1,3-butadiene resulting from steps (I) and (II); and distillation of said stream of crude 1,3-butadiene i n order to obtain pure 1,3-butadiene (III). Steps I and II take place in a single column or in thermally coupled columns and step III is carried out in a second column.

公开(公告)号：AU3541601A

公开(公告)日：2001-08-07

申请号：AU3541601

申请日：2001-01-12

Applicant: BASF AG

Inventor： AUER HEINZ ,  BESSLING BERND ,  HAMMER HANS ,  HASSE HANS ,  SAUER FRIEDRICH ,  VICARI MAXIMILIAN ,  ADRIAN TILL

IPC: B01J14/00 ,  C07C27/02 ,  C07C51/09 ,  C07C51/44 ,  C07C51/48 ,  C07C53/02

Abstract: The invention relates to a process for obtaining anhydrous or substantially anhydrous formic acid, in which firstly aqueous formic acid is prepared by hydrolysis of methyl formate and is freed from water in the subsequent work-up. The process has the special feature that steam, which is employed for the hydrolysis of methyl formate and for heating a distillation column serving for work-up, is also used as stripping steam for waste-water stripping. The stripped waste water is produced during work-up.

公开(公告)号：AU2848701A

公开(公告)日：2001-08-07

申请号：AU2848701

申请日：2001-01-24

Applicant: BASF AG

Inventor： AUER HEINZ ,  BESSLING BERND ,  HAMMER HANS ,  HASSE HANS ,  SAUER FRIEDRICH ,  VICARI MAXIMILIAN ,  WAGNER GERHARD ,  ADRIAN TILL

IPC: C07C51/56 ,  C07C51/09 ,  C07C51/44 ,  C07C51/48 ,  C07C53/02

Abstract: The invention relates to a process for obtaining anhydrous or substantially anhydrous formic acid in which, during the work-up, a compound of the general formula Iwhere the radicals R1 and R2 are alkyl, cycloalkyl, aryl or aralkyl groups, or R1 and R2 jointly, together with the N atom, form a heterocyclic 5- or 6-membered ring, and only one of the radicals is an aryl group, and where R3 is hydrogen or a C1-C4-alkyl group,is employed simultaneously as extractant for formic acid and as antifoam for a distillation process.

公开(公告)号：BR9913891A

公开(公告)日：2001-07-03

申请号：BR9913891

申请日：1999-09-21

Applicant: BASF AG

Inventor： ADRIAN TILL ,  BESSLING BERND ,  HASSE HANS ,  VANSANT FRANS ,  THEIS GERHARD

IPC: C07C29/10 ,  C07C29/76 ,  C07C29/80 ,  C07C31/20

Abstract: A process for the distillative recovery of high purity monoethylene glycol from the hydrolysis product of ethylene oxide by pressure dewatering, vacuum dewatering and subsequent purifying distillation, which includes the pressure dewatering columns or at least the first pressure dewatering column of the battery (2, 3, 4) having a stripping section with at least one separating stage, preferably with from 2 to 10 separating stages, particularly preferably with from 3 to 6 stages, and a portion of the overhead stream of the pressure dewatering column(s) (2, 3, 4) having a stripping section being removed from the system.

公开(公告)号：DE19843721A1

公开(公告)日：2000-03-30

申请号：DE19843721

申请日：1998-09-23

Applicant: BASF AG

Inventor： ADRIAN TILL ,  HASSE HANS ,  VANSANT FRANS ,  THEIS GERHARD

IPC: C07C29/10 ,  C07D301/32 ,  C07D301/04

Abstract: The invention relates to a method for the continuous production of an aqueous ethylene oxide solution by absorbing ethylene oxide from a gaseous mixture containing 1.5 to 4 mole percent, preferably 2.5 to 3 mole percent of ethylene oxide in the wash water in an absorber. The mixture drawn directly from the absorber has a water/ethylene oxide weight ratio of 5 to 20, preferably of 10 to 15. The absorbed mixture is especially useful for directly feeding it to a secondary reactor for the production of glycol.

公开(公告)号：CA2345140A1

公开(公告)日：2000-03-30

申请号：CA2345140

申请日：1999-09-21

Applicant: BASF AG

Inventor： HASSE HANS ,  THEIS GERHARD ,  VANSANT FRANS ,  ADRIAN TILL ,  BESSLING BERND

IPC: C07C29/10 ,  C07C29/76 ,  C07C29/80 ,  C07C31/20

Abstract: The invention relates to a method for obtaining highly pure monoethylene glycol from the product of hydrolysis of ethylene oxide by distillation, by means of dehydration under pressure, preferably in a cascade, vacuum dehydration and subsequent pure distillation. According to the inventive method, the pressure dehydration column or at least the first pressure dehydration column of the cascade (2, 3, 4) has a stripping section with at least one separation stage, preferably 2-10 separation stages, especially 3- 6 stages, and in that part of the top flow of the dehydration column(s) (2, 3, 4) is sluiced out with the stripping section.