Title:
PROCESS FOR PRODUCING DIALKYL CARBONATE AND DIOL
Document Type and Number:
WIPO Patent Application WO/2005/123638
Kind Code:
A1
Abstract:
A process for producing a dialkyl carbonate and a diol, comprising (a) subjecting a cyclic carbonate and an aliphatic monohydric alcohol to transesterification in the presence of a transesterification catalyst to produce a reaction solution containing a dialkyl carbonate and a diol, (b) extracting a dialkyl carbonate-containing reaction solution from the reaction solution and then separating a dialkyl carbonate from the dialkyl carbonate-containing reaction solution, and (c) extracting a diol-containing reaction solution from the reaction solution and then separating a diol from the diol-containing reaction solution. This process is characterized in that the content of a cyclic ether in the cyclic carbonate is 0.1 to 3,000 ppm and the content of carbonate ether in the dialkyl carbonate thus obtained is not more than 10,000 ppm.
Inventors:
TOJO MASAHIRO (JP)
MIYAJI HIRONORI (JP)
MIYAJI HIRONORI (JP)
Application Number:
PCT/JP2005/011107
Publication Date:
December 29, 2005
Filing Date:
June 17, 2005
Export Citation:
Assignee:
ASAHI KASEI CHEMICALS CORP (JP)
TOJO MASAHIRO (JP)
MIYAJI HIRONORI (JP)
TOJO MASAHIRO (JP)
MIYAJI HIRONORI (JP)
International Classes:
C07C27/02; C07C29/128; C07C31/20; C07C68/06; C07C69/96; (IPC1-7): C07C27/02; C07C29/128; C07C31/20; C07C68/06; C07C69/96
Foreign References:
| JP2004131394A | 2004-04-30 | |||
| JP2002308804A | 2002-10-23 | |||
| JP2002371037A | 2002-12-26 |
Other References:
None
Attorney, Agent or Firm:
Watanabe, Junzo (Akasaka Habitation Building 3-5, Akasaka
1-chome, Minato-k, Tokyo 52, JP)
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