Title:
芳香族カーボネート類を工業的に製造する方法
Document Type and Number:
Japanese Patent JP4224511
Kind Code:
B2
Abstract:
It is an object of the present invention to provide, for the case of continuously producing aromatic carbonates containing a diaryl carbonate as a main product by taking an alkyl aryl carbonate containing specific amounts of a dialkyl carbonate and an aromatic monohydroxy compound as a starting material, in which said alkyl aryl carbonate is obtainable through a transesterification reaction between a dialkyl carbonate and an aromatic monohydroxy compound, using a continuous multi-stage distillation column in which a catalyst is present, and continuously feeding the starting material into the continuous multi-stage distillation column, a specific process that enables the diaryl carbonate to be produced with high selectivity and high productivity stably for a prolonged period of time on an industrial scale of not less than 1 ton per hour. Although there have been various proposals regarding processes for the production of aromatic carbonates by means of a reactive distillation method, these have all been on a small scale and short operating time laboratory level, and there have been no disclosures whatsoever on a specific process or apparatus enabling mass production on an industrial scale. According to the present invention, there is provided a specified continuous multi-stage distillation column, and there is also provided a specific process that enables a diaryl carbonate to be produced with high selectivity and high productivity stably for a prolonged period of time on an industrial scale of not less than 1 ton per hour from an alkyl aryl carbonate containing specific amounts of the dialkyl carbonate and the aromatic monohydroxy compound.
Inventors:
Shinichi Fukuoka
Hiroshi Hachiya
Kazuhiko Matsuzaki
Hiroshi Hachiya
Kazuhiko Matsuzaki
Application Number:
JP2006529041A
Publication Date:
February 18, 2009
Filing Date:
July 11, 2005
Export Citation:
Assignee:
Asahi Kasei Chemicals Corporation
International Classes:
C07C68/06; B01D3/14; B01D3/26; B01D3/32; C07C68/08; C07C69/96; C07B61/00
Domestic Patent References:
| JP4100824A | ||||
| JP2003516376A |
Foreign References:
| WO1991009832A1 | ||||
| WO2006001256A1 | ||||
| WO2006001257A1 | ||||
| WO2006006566A1 |
Attorney, Agent or Firm:
Yoshiyuki Inaba
Shinji Oga
Toshifumi Onuki
Shinji Oga
Toshifumi Onuki