公开(公告)号：JPH11158263A

公开(公告)日：1999-06-15

申请号：JP27181698

申请日：1998-09-25

Applicant: BASF AG

Inventor： AUER HEINZ ,  BEISER KLAUS ,  CIPRIAN JUERGEN DR ,  FRANZ LOTHAR DR ,  FRANZISCHKA WOLFGANG DR ,  PESSEL ULRICH-DIETER ,  WEINLE WERNER

IPC: B01J19/00 ,  B01J19/18 ,  C08G65/20 ,  C08G65/30 ,  C08G65/32 ,  C08G65/331

Abstract: PROBLEM TO BE SOLVED: To provide a process whereby a hydroxyl-contg. polymer, esp. a hydroxyl-terminated polytetrahydrofuran, is produced from the corresponding alkoxy-contg. polymer by the transesterification with an alcohol continuously in a mass of at least 100% of the nominal capacity without being obstructed by the occurrence of air bubbles. SOLUTION: This process continuously produces a hydroxyl-contg. polymer, esp. a hydroxyl-terminated polytetrahydrofuran, from the corresponding acyloxy- contg. polymer by the transesterification with an alcohol in at least one stirring reactor (I, II, III, or IV). Air bubbles occurring in the transesterification are broken by introducing the bubbles in the tangential direction at a suitable velocity into circular cylindrical containers 5, 13, esp. into cyclone separators, and thus formed liq. phase is returned through a pipe 3, 3' to at least one stirring reactor (I, II, III, or IV) in order to be recycled. The recycling is pref. done at stirring reactor cascades, and the subunit of each reactor is or subunits of at least two reactors are each individually connected to the circular cylindrical containers, esp. the cyclone separators.

公开(公告)号：JPH11255885A

公开(公告)日：1999-09-21

申请号：JP36937398

申请日：1998-12-25

Applicant: BASF AG

Inventor： BEER WULFRICH FRIEDEMANN ,  BEISER KLAUS ,  CIPRIAN JUERGEN DR ,  FRANZ LOTHAR DR ,  FRANZISCHKA WOLFGANG ,  PALM CHRISTOF DR ,  PAPE FRANK-FRIEDRICH DR ,  PAUL AXEL ,  PESSEL ULRICH-DIETER ,  WECK ALEXANDER

IPC: B01J39/04 ,  B01J39/05 ,  B01J47/02 ,  B01J47/026 ,  B01J49/00 ,  B01J49/06 ,  C08F6/08 ,  C08G65/20 ,  C08G65/30 ,  C08G65/331 ,  C08J5/20

Abstract: PROBLEM TO BE SOLVED: To provide a process for removing the sodium once more which derives from a catalyst after transesterification with minimum facilities. SOLUTION: For producing a hydroxyl group-containing polymer, especially a polytetrahydrofuran containing a hydroxyl end group, a corresponding acyloxy group-containing polymer, used as a start material, is transesterified with an alcohol in the presence of a sodium-containing catalyst, and for removing sodium cations, following the transesterification, in a catalytic amount of water, the polytetrahydrofuran solution is directly introduced into at least one ion exchanger and allowed to flow through it.

公开(公告)号：DE59806798D1

公开(公告)日：2003-02-13

申请号：DE59806798

申请日：1998-09-25

Applicant: BASF AG

Inventor： AUER HEINZ ,  BEISER KLAUS ,  CIPRIAN DR ,  FRANZ DR ,  FRANZISCHKA DR ,  PESSEL ULRICH-DIETER ,  WEINLE WERNER

IPC: B01J19/00 ,  B01J19/18 ,  C08G65/20 ,  C08G65/30 ,  C08G65/32 ,  C08G65/331

Abstract: The foam produced during the continuous production of hydroxyl (OH) group terminated polytetrahydrofuran is removed and by transesterification of the corresponding ester group containing polymer. A process for preparing OH group containing polymers, especially for preparing polytetrahydrofuran with terminal OH groups, by transesterification of the corresponding ester group-containing polymers with alcohols. Tranesterification is carried out continuously in at least one stirred reactor (I,II,III,IV), where at least one reactor (I,II,III,IV) being connected via a line (3,3') to a generally cylindrical container (5,13'), with a diameter of about 2-4 times the diameter of the line (3,3'), to take up the foam formed in the stirred reactor(s) (I,II,III,IV) and to pass the foam tangentially into the cylindrical container (5,13) at a speed sufficient to separate the foam into a gaseous phase and a liquid phase. The gas phase is led off via a line (9) and the liquid phase is led off via a line (7,15).

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.

公开(公告)号：ES2190025T3

公开(公告)日：2003-07-16

申请号：ES98118312

申请日：1998-09-25

Applicant: BASF AG

Inventor： AUER HEINZ ,  BEISER KLAUS ,  CIPRIAN JURGEN DR ,  FRANZ LOTHAR DR ,  FRANZISCHKA WOLFGANG DR ,  PESSEL ULRICH-DIETER

IPC: B01J19/00 ,  B01J19/18 ,  C08G65/20 ,  C08G65/30 ,  C08G65/32 ,  C08G65/331

Abstract: The foam produced during the continuous production of hydroxyl (OH) group terminated polytetrahydrofuran is removed and by transesterification of the corresponding ester group containing polymer. A process for preparing OH group containing polymers, especially for preparing polytetrahydrofuran with terminal OH groups, by transesterification of the corresponding ester group-containing polymers with alcohols. Tranesterification is carried out continuously in at least one stirred reactor (I,II,III,IV), where at least one reactor (I,II,III,IV) being connected via a line (3,3') to a generally cylindrical container (5,13'), with a diameter of about 2-4 times the diameter of the line (3,3'), to take up the foam formed in the stirred reactor(s) (I,II,III,IV) and to pass the foam tangentially into the cylindrical container (5,13) at a speed sufficient to separate the foam into a gaseous phase and a liquid phase. The gas phase is led off via a line (9) and the liquid phase is led off via a line (7,15).

公开(公告)号：DE19758296A1

公开(公告)日：1999-07-01

申请号：DE19758296

申请日：1997-12-31

Applicant: BASF AG

Inventor： BEER WULFRICH FRIEDEMANN DR ,  BEISER KLAUS ,  CIPRIAN JUERGEN DR ,  FRANZ LOTHAR DR ,  FRANZISCHKA WOLFGANG DR ,  PALM CHRISTOF DR ,  PAPE FRANK-FRIEDRICH DR ,  PAUL AXEL DR ,  PESSEL ULRICH-DIETER ,  WECK ALEXNDER

IPC: B01J39/04 ,  B01J39/05 ,  B01J47/02 ,  B01J47/026 ,  B01J49/00 ,  B01J49/06 ,  C08F6/08 ,  C08G65/20 ,  C08G65/30 ,  C08G65/331 ,  C08J5/20 ,  C08L71/14

Abstract: The production of a hydroxyl group containing polymer, preferably polytetrahydrofuran, by ester exchange of the corresponding acyloxy group containing polymer with alcohol in the presence of a sodium containing catalyst involves separation of the sodium cation using a catalytic amount of water by passage through an ion exchange material.

公开(公告)号：DE59809861D1

公开(公告)日：2003-11-20

申请号：DE59809861

申请日：1998-12-22

Applicant: BASF AG

Inventor： BEER DR ,  BEISER KLAUS ,  CIPRIAN DR ,  FRANZ DR ,  FRANZISCHKA DR ,  PALM DR ,  PAPE DR ,  PAUL DR ,  PESSEL ULRICH-DIETER ,  WECK ALEXANDER

IPC: B01J39/04 ,  B01J39/05 ,  B01J47/02 ,  B01J47/026 ,  B01J49/00 ,  B01J49/06 ,  C08F6/08 ,  C08G65/20 ,  C08G65/30 ,  C08G65/331 ,  C08J5/20

Abstract: The production of a hydroxyl group containing polymer, preferably polytetrahydrofuran, by ester exchange of the corresponding acyloxy group containing polymer with alcohol in the presence of a sodium containing catalyst involves separation of the sodium cation using a catalytic amount of water by passage through an ion exchange material.

公开(公告)号：AT230423T

公开(公告)日：2003-01-15

申请号：AT98118312

申请日：1998-09-25

Applicant: BASF AG

Inventor： AUER HEINZ ,  BEISER KLAUS ,  CIPRIAN JUERGEN DR ,  FRANZ LOTHAR DR ,  FRANZISCHKA WOLFGANG DR ,  PESSEL ULRICH-DIETER ,  WEINLE WERNER

IPC: B01J19/00 ,  B01J19/18 ,  C08G65/20 ,  C08G65/30 ,  C08G65/32 ,  C08G65/331

Abstract: The foam produced during the continuous production of hydroxyl (OH) group terminated polytetrahydrofuran is removed and by transesterification of the corresponding ester group containing polymer. A process for preparing OH group containing polymers, especially for preparing polytetrahydrofuran with terminal OH groups, by transesterification of the corresponding ester group-containing polymers with alcohols. Tranesterification is carried out continuously in at least one stirred reactor (I,II,III,IV), where at least one reactor (I,II,III,IV) being connected via a line (3,3') to a generally cylindrical container (5,13'), with a diameter of about 2-4 times the diameter of the line (3,3'), to take up the foam formed in the stirred reactor(s) (I,II,III,IV) and to pass the foam tangentially into the cylindrical container (5,13) at a speed sufficient to separate the foam into a gaseous phase and a liquid phase. The gas phase is led off via a line (9) and the liquid phase is led off via a line (7,15).

公开(公告)号：DE19742342A1

公开(公告)日：1999-04-01

申请号：DE19742342

申请日：1997-09-25

Applicant: BASF AG

Inventor： AUER HEINZ ,  BEISER KLAUS ,  CIPRIAN JUERGEN DR ,  FRANZ LOTHAR DR ,  FRANZISCHKA WOLFGANG DR ,  PESSEL ULRICH-DIETER ,  WEINLE WERNER

IPC: B01J19/00 ,  B01J19/18 ,  C08G65/20 ,  C08G65/30 ,  C08G65/32 ,  C08G65/331

Abstract: The foam produced during the continuous production of hydroxyl (OH) group terminated polytetrahydrofuran is removed and by transesterification of the corresponding ester group containing polymer. A process for preparing OH group containing polymers, especially for preparing polytetrahydrofuran with terminal OH groups, by transesterification of the corresponding ester group-containing polymers with alcohols. Tranesterification is carried out continuously in at least one stirred reactor (I,II,III,IV), where at least one reactor (I,II,III,IV) being connected via a line (3,3') to a generally cylindrical container (5,13'), with a diameter of about 2-4 times the diameter of the line (3,3'), to take up the foam formed in the stirred reactor(s) (I,II,III,IV) and to pass the foam tangentially into the cylindrical container (5,13) at a speed sufficient to separate the foam into a gaseous phase and a liquid phase. The gas phase is led off via a line (9) and the liquid phase is led off via a line (7,15).

公开(公告)号：AT251651T

公开(公告)日：2003-10-15

申请号：AT98124438

申请日：1998-12-22

Applicant: BASF AG

Inventor： BEER WULF FRIEDEMANN DR ,  BEISER KLAUS ,  CIPRIAN JUERGEN DR ,  FRANZ LOTHAR DR ,  FRANZISCHKA WOLFGANG DR ,  PALM CHRISTOF DR ,  PAPE FRANK-FRIEDRICH DR ,  PAUL AXEL DR ,  PESSEL ULRICH-DIETER ,  WECK ALEXANDER

IPC: B01J39/04 ,  B01J39/05 ,  B01J47/02 ,  B01J47/026 ,  B01J49/00 ,  B01J49/06 ,  C08F6/08 ,  C08G65/20 ,  C08G65/30 ,  C08G65/331 ,  C08J5/20

Abstract: The production of a hydroxyl group containing polymer, preferably polytetrahydrofuran, by ester exchange of the corresponding acyloxy group containing polymer with alcohol in the presence of a sodium containing catalyst involves separation of the sodium cation using a catalytic amount of water by passage through an ion exchange material.