Title:
ジアルキルカーボネートとジオール類の工業的製造方法
Document Type and Number:
Japanese Patent JP4236275
Kind Code:
B2
Abstract:
It is an object of the present invention to provide a specific process that enables a dialkyl carbonate and a diol to be produced on an industrial scale of not less than 2 ton / hr and not less than 1.3 ton / hr respectively with high selectivity and high productivity stably for a prolonged period of time through a reactive distillation system of taking a cyclic carbonate and an aliphatic monohydric alcohol as starting materials, continuously feeding the starting materials into a continuous multi-stage distillation column in which a catalyst is present, and carrying out reaction and distillation simultaneously in the column. Although there have been many proposals regarding processes for the production of the dialkyl carbonate and the diol through the 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 specific continuous multi-stage distillation column having a specified structure, and a production process using this continuous multi-stage distillation column, according to which the dialkyl carbonate and the diol can be produced on an industrial scale of not less than 2 ton / hr and not less than 1.3 ton / hr respectively each with a selectivity of not less than 95%, preferably not less than 97%, more preferably not less than 99%, stably for not less than 1000 hours, preferably not less than 3000 hours, more preferably not less than 5000 hours.
Inventors:
Shinichi Fukuoka
Yuki Miyaji
Hiroshi Hachiya
Kazuhiko Matsuzaki
Yuki Miyaji
Hiroshi Hachiya
Kazuhiko Matsuzaki
Application Number:
JP2007546423A
Publication Date:
March 11, 2009
Filing Date:
November 17, 2006
Export Citation:
Assignee:
Asahi Kasei Chemicals Corporation
International Classes:
C07C27/02; C07C29/128; C07C29/80; C07C31/20; C07C68/06; C07C68/08; C07C69/96; C07B61/00
Domestic Patent References:
| JP2006199643A | ||||
| JP2006206497A | ||||
| JP2006182683A | ||||
| JP2003342209A | ||||
| JP2003119168A | ||||
| JP2003300936A |
Foreign References:
| WO2005123638A1 |
Attorney, Agent or Firm:
Yoshiyuki Inaba
Shinji Oga
Toshifumi Onuki
Shinji Oga
Toshifumi Onuki