Title:
副生アルコール類を工業的に分離する方法
Document Type and Number:
Japanese Patent JP4174541
Kind Code:
B2
Abstract:
It is an object of the present invention to provide a specific industrial separation process that enables a by-produced alcohol to be separated out efficiently and stably for a prolonged period of time from a large amount (not less than 1 ton /hr) of a low boiling point reaction mixture having a specified composition containing the by-produced alcohol when mass-producing aromatic carbonates on an industrial scale by subjecting a dialkyl carbonate and an aromatic monohydroxy compound to transesterification reaction in a reactive distillation column in which a catalyst is present. 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 to be carried out stably for a prolonged period of time. Moreover, there have been no disclosures on a specific process or apparatus enabling the alcohol by-produced when producing the aromatic carbonates on an industrial scale using a reactive distillation system to be separated out efficiently and stably for a prolonged period of time on an industrial scale of not less than 200 kg / hr. According to the present invention, there is proposed a specific process that enables the above object to be attained by using the continuous multi-stage distillation column having a specified structure and a large amount (not less than 1 ton / hr) of a low boiling point reaction mixture having a specified composition containing the by-produced alcohol.
Inventors:
Shinichi Fukuoka
Yuki Miyaji
Hiroshi Hachiya
Kazuhiko Matsuzaki
Yuki Miyaji
Hiroshi Hachiya
Kazuhiko Matsuzaki
Application Number:
JP2006536361A
Publication Date:
November 05, 2008
Filing Date:
September 16, 2005
Export Citation:
Assignee:
Asahi Kasei Chemicals Corporation
International Classes:
C07C27/28; C07C27/02; C07C29/128; C07C29/80; C07C31/04; C07C68/06; C07C68/08; C07C69/96; B01D3/14; B01D3/16; B01D3/22
Domestic Patent References:
| JP9176094A | ||||
| JP2003516376A | ||||
| JP9110805A | ||||
| JP200164235A | ||||
| JP2004323384A |
Foreign References:
| WO2006030724A1 |
Attorney, Agent or Firm:
Yoshiyuki Inaba
Shinji Oga
Toshifumi Onuki
Shinji Oga
Toshifumi Onuki