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Title:
PROCESS FOR INDUSTRIAL PRODUCTION OF DIALKYL CARBONATES AND DIOLS
Document Type and Number:
WIPO Patent Application WO/2007/060893
Kind Code:
A1
Abstract:
The invention aims at providing a concrete process for producing a dialkyl carbonate and a diol stably on an industrial scale of 2 tons or above and 1.3 tons or above respectively per hour with high selectivity and high productivity over a long period by a reaction-distillation method which comprises using a cyclic carbonate and an aliphatic monohydric alcohol as the raw materials and continuously feeding the raw materials into a continuous multi-stage distillation column holding a catalyst therein to conduct reaction and distillation in the column simultaneously. Although there are many attempts to produce dialkyl carbonates and diols by reaction-distillation method, all of the attempts relate to small-scale, short-period and laboratory-level production of dialkyl carbonates and diols and there is no particular disclosure about the process or equipment for mass-production thereof on an industrial scale. The invention provides a concrete continuous multi-stage distillation column having a specific structure which permits stable production of a dialkyl carbonate and a diol on an industrial scale of 2 tons or above and 1.3 tons or above respectively per hour with a selectivity of 95% or above, preferably 97% or above, still preferably 99% or above over 1000 hours or longer, preferably 3000 hours or longer, still preferably 5000 hours or longer; and a process for the production with the column.

Inventors:
FUKUOKA SHINSUKE (JP)
MIYAJI HIRONORI (JP)
HACHIYA HIROSHI (JP)
MATSUZAKI KAZUHIKO (JP)
Application Number:
PCT/JP2006/323019
Publication Date:
May 31, 2007
Filing Date:
November 17, 2006
Export Citation:
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Assignee:
ASAHI KASEI CHEMICALS CORP (JP)
FUKUOKA SHINSUKE (JP)
MIYAJI HIRONORI (JP)
HACHIYA HIROSHI (JP)
MATSUZAKI KAZUHIKO (JP)
International Classes:
C07C29/128; C07B61/00; C07C29/80; C07C31/20; C07C68/06; C07C68/08; C07C69/96
Domestic Patent References:
WO2005123638A12005-12-29
Foreign References:
JP2006199643A2006-08-03
JP2006206497A2006-08-10
JP2006182683A2006-07-13
JP2003342209A2003-12-03
JP2003119168A2003-04-23
JP2003300936A2003-10-21
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (Roppongi Hills Mori Tower 6-10-1, Roppong, Minato-ku Tokyo 23, JP)
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