公开(公告)号：DE1296648B

公开(公告)日：1969-06-04

申请号：DEB0082618

申请日：1965-06-30

Applicant: BASF AG

Inventor： SCHNEIDER ,  KURT DR ,  PASEDACH ,  HEINRICH DR ,  STEDEN ,  FRANZ DR ,  WEHR ,  RUDOLF DR

IPC: C11B9/00

公开(公告)号：DE1295554B

公开(公告)日：1969-05-22

申请号：DEB0076769

申请日：1964-05-14

Applicant: BASF AG

Inventor： WESTPHAL ,  FRANZ DR

IPC: C07D209/08

公开(公告)号：DE1293777B

公开(公告)日：1969-04-30

申请号：DEB0092453

申请日：1967-05-10

Applicant: BASF AG

Inventor： PLATZ ,  ROLF DR ,  MERGER ,  FRANZ DR

IPC: C07C37/50

公开(公告)号：DE1292661B

公开(公告)日：1969-04-17

申请号：DEB0092506

申请日：1967-05-13

Applicant: BASF AG

Inventor： PLATZ ,  ROLF DR ,  MERGER ,  FRANZ DR

IPC: C07C37/62

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：DE1299123B

公开(公告)日：1969-07-10

申请号：DEB0079248

申请日：1964-11-07

Applicant: BASF AG

Inventor： SCHAEDLER ,  HUGO DR ,  STEDEN ,  FRANZ DR ,  SCHUSTER ,  LUDWIG DR

IPC: C08G69/26 ,  C08L63/00 ,  C08L77/00

公开(公告)号：DE1285996B

公开(公告)日：1969-01-02

申请号：DEB0088897

申请日：1966-09-14

Applicant: BASF AG

Inventor： REICHENEDER ,  FRANZ DR ,  KRUSCHE ,  GEORG DR

IPC: C07C45/29

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).