Title:
【発明の名称】脂肪族オリゴカーボネートジオールの製造法
Document Type and Number:
Japanese Patent JP2003535936
Kind Code:
A
Abstract:
A process for the production of aliphatic oligocarbonate diols is disclosed. The optionally catalyzed high yield process entails the multistage transesterification of aliphatic diols with dimethyl carbonate. In the process DMC-methanol mixtures that have been distilled off are recycled to the reaction solution with further conversion and depletion of the contained DMC in the same or in a following reaction batch.
Inventors:
Andreas Shremenato
Jörg Tilak
Jörg Rayu
Herbert Witsek
Jörg Tilak
Jörg Rayu
Herbert Witsek
Application Number:
JP2002501991A
Publication Date:
December 02, 2003
Filing Date:
May 25, 2001
Export Citation:
Assignee:
Bayer Aktiengesellschaft
International Classes:
C07B61/00; C07C69/96; C08G18/44; C08G64/30; C09D163/00; C09D169/00; C09D175/04; C09J163/00; C09J169/00; C09J175/04; C07C68/06; (IPC1-7): C08G64/30; C07C68/06; C07C69/96; C08G18/44; C09D163/00; C09D169/00; C09D175/04; C09J163/00; C09J169/00; C09J175/04
Domestic Patent References:
| JPH04239024A | 1992-08-26 | |||
| JPH05239202A | 1993-09-17 | |||
| JPH09165443A | 1997-06-24 | |||
| JPH10251398A | 1998-09-22 | |||
| JP2002519491A | 2002-07-02 | |||
| JPH02284918A | 1990-11-22 |
Foreign References:
| WO2000001755A2 | 2000-01-13 | |||
| WO1995027749A1 | 1995-10-19 |
Attorney, Agent or Firm:
Aoyama Ryo (2 outside people)