公开(公告)号：DE59108617D1

公开(公告)日：1997-04-17

申请号：DE59108617

申请日：1991-12-21

Applicant: BASF AG

Inventor： BECKER ROLF DR ,  BRUHN JENS ,  SEIFERT HELMUT DR ,  STEINEBRUNNER KLAUS DR ,  LEUCKEL WOLFGANG PROF DR

IPC: C01B17/50 ,  C01B17/58 ,  C01B21/02 ,  C01C1/02 ,  C02F1/58 ,  C02F11/06 ,  F23G7/00

公开(公告)号：DE4101497A1

公开(公告)日：1992-07-23

申请号：DE4101497

申请日：1991-01-19

Applicant: BASF AG

Inventor： BECKER ROLF DR ,  BRUHN JENS ,  SEIFERT HELMUT DR ,  STEINEBRUNNER KLAUS DR ,  LEUCKEL WOLFGANG PROF DR

IPC: C01B17/50 ,  C01B17/58 ,  C01B21/02 ,  C01C1/02 ,  C02F1/58 ,  C02F11/06 ,  F23G7/00

公开(公告)号：ES2098310T3

公开(公告)日：1997-05-01

申请号：ES91122071

申请日：1991-12-21

Applicant: BASF AG

Inventor： BECKER ROLF DR ,  BRUHN JENS ,  SEIFERT HELMUT DR ,  STEINEBRUNNER KLAUS DR ,  LEUCKEL WOLFGANG PROF DR

IPC: C01B17/50 ,  C01B17/58 ,  C01B21/02 ,  C01C1/02 ,  C02F1/58 ,  C02F11/06 ,  F23G7/00

公开(公告)号：DE19710443A1

公开(公告)日：1998-09-17

申请号：DE19710443

申请日：1997-03-13

Applicant: BASF AG

Inventor： GUETTES BERND ,  HOEPPNER GERD ,  WETTERLING MONIKA ,  AUER HEINZ ,  BRUHN JENS ,  DINSCH STEFAN ,  WINKLER JUERGEN

IPC: C08G65/30 ,  C08G18/48 ,  C08L75/08

Abstract: The treatment of polyether-polyols (I) which are obtained by conventional base-catalysed reaction of H- functional starters with alkylene oxides and then freed from catalyst and optionally any salt produced. Treatment comprises a combination of (a) thermal reaction at a pH of less than 7 and a temperature above 60 degrees C and (b) thermal distillation in a counter-current column using a purifying agent (II). Preferably step (a) is carried out at a pH of less than 6, preferably by adding acid and/or acidic substances, or by performing this step in presence of acid-reacting sorbents. The temperature rises to above 90 degrees C in step (a). Step (b) is carried out in a column with a counter-current of (II) at a gas velocity of 0.1-2 m/sec. and a liquid loading of 1-10 m /m /hr.

公开(公告)号：CA2229357A1

公开(公告)日：1998-09-13

申请号：CA2229357

申请日：1998-03-12

Applicant: WETTERLING MONIKA ,  AUER HEINZ ,  BRUHN JENS ,  WINKLER JUERGEN ,  GUETTES BERND ,  DINSCH STEFAN ,  HOEPPNER GERD ,  BASF AG

Inventor： BRUHN JENS ,  DINSCH STEFAN ,  WINKLER JUERGEN ,  GUETTES BERND ,  HOEPPNER GERD ,  AUER HEINZ ,  WETTERLING MONIKA

IPC: C08G65/30 ,  C07C43/11 ,  C07C41/42 ,  C08G18/48

Abstract: A process for treating polyether polyols prepared in a conventional manner by base-catalyzed reaction of H-functional initiator substances with alkylene oxides comprises a combination of a thermal-reactive step at a pH of less than 7 and a temperature above 60.degree.C and a thermal-distillative step in a countercurrent column using a purifying agent. The polyether polyols prepared according to the invention are used for producing low-fogging and low-odor PUR foams.