Title:
METHOD FOR PURIFYING DIARYL CARBONATE
Document Type and Number:
Japanese Patent JP2009137952
Kind Code:
A
Abstract:
To provide a method for purifying a diaryl carbonate.
The method comprises steps of: transesterifying a dialkyl carbonate and an aromatic hydroxy compound in the presence of a transesterification catalyst to provide a diaryl carbonate product comprising the transesterification catalyst as an impurity; subjecting the diaryl carbonate product to distillation in a first distillation column having an upper part and a lower part, wherein the upper part comprises a purification part and the lower part comprises a recovery part; and withdrawing a first side stream containing the purified diaryl carbonate from the first distillation column.
Inventors:
OOMS PIETER
RECHNER JOHANN
BOEHM MATTHIAS
DUEX ANDRE
HALLENBERGER KASPAR
RONGE GEORG
EYNDE JOHAN VANDEN
RECHNER JOHANN
BOEHM MATTHIAS
DUEX ANDRE
HALLENBERGER KASPAR
RONGE GEORG
EYNDE JOHAN VANDEN
Application Number:
JP2008295625A
Publication Date:
June 25, 2009
Filing Date:
November 19, 2008
Export Citation:
Assignee:
BAYER MATERIALSCIENCE AG
International Classes:
C07C68/06; B01D3/14; C07C68/08; C07C69/96; C07B61/00
Domestic Patent References:
| JPH09194437A | 1997-07-29 | |||
| JPS59142801A | 1984-08-16 | |||
| JPH03291257A | 1991-12-20 | |||
| JP2004323384A | 2004-11-18 | |||
| JP2004155760A | 2004-06-03 |
Foreign References:
| WO2006043491A1 | 2006-04-27 | |||
| WO2006025478A1 | 2006-03-09 |
Attorney, Agent or Firm:
Samejima Mutsumi
Kyousei Tamura
Genban Sanae
Kyousei Tamura
Genban Sanae
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