Title:
PROCESS FOR PRODUCTION OF DIALKYL CARBONATE AND DIOL IN INDUSTRIAL SCALE
Document Type and Number:
WIPO Patent Application WO/2007/069513
Kind Code:
A1
Abstract:
The object is to provide a specific process for production of a dialkyl carbonate and
a diol using a cyclic carbonate and a monohydric aliphatic alcohol as raw materials, by
a reaction distillation method in which the raw materials are fed continuously into
a continuous multi-stage distillation column containing a catalyst to achieve
both the reaction and the distillation simultaneously in the column, wherein
the dialkyl carbonate and the diol can be produced stably for a long period in an
industrial scale of 2 tons or more per hour and 1.3 tons or more per hour, respectively, with
high selectivities and high yields. Although various process for production of
a dialkyl carbonate and a diol by a reaction distillation method have been proposed, these
are all relate to the production at a laboratory level (i.e., a small scale and
a short production period). There has been no disclosure about a process or apparatus
for the industrial-scale mass production of a dialkyl carbonate and a diol. Thus,
disclosed is a process for production of a dialkyl carbonate and a diol which is
characterized in that: a continuous multi-stage distillation column is used
which has such a specific constitution that the dialkyl carbonate and the diol
can be produced stably for a period of 1000 hours or longer, preferably 3000 hours
or longer, more preferably 5000 hours or longer, in an industrial scale of 2 tons
or more per hour and 1.3 tons or more per hour, respectively, and at a selectivity of
95% or higher for the both, preferably 97% or higher, more preferably 99% or higher;
the raw materials are fed into a specific stage of the distillation column; and
a monohydric aliphatic alcohol having a specific composition is used as a raw
material.
Inventors:
FUKUOKA SHINSUKE (JP)
MIYAJI HIRONORI (JP)
HACHIYA HIROSHI (JP)
MATSUZAKI KAZUHIKO (JP)
MIYAJI HIRONORI (JP)
HACHIYA HIROSHI (JP)
MATSUZAKI KAZUHIKO (JP)
Application Number:
PCT/JP2006/324351
Publication Date:
June 21, 2007
Filing Date:
December 06, 2006
Export Citation:
Assignee:
ASAHI KASEI CHEMCIALS CORP (JP)
FUKUOKA SHINSUKE (JP)
MIYAJI HIRONORI (JP)
HACHIYA HIROSHI (JP)
MATSUZAKI KAZUHIKO (JP)
FUKUOKA SHINSUKE (JP)
MIYAJI HIRONORI (JP)
HACHIYA HIROSHI (JP)
MATSUZAKI KAZUHIKO (JP)
International Classes:
C07C27/02; B01D3/14; B01D3/22; B01D3/32; C07C29/128; C07C31/20; C07C68/06; C07C69/96; C07B61/00
Domestic Patent References:
| WO2000051954A1 | 2000-09-08 | |||
| WO2005123638A1 | 2005-12-29 | |||
| WO2006001256A1 | 2006-01-05 |
Foreign References:
| JPH09183744A | 1997-07-15 | |||
| JP2003342209A | 2003-12-03 |
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (Roppongi Hills Mori Tower 6-10-1, Roppongi, Minato-k, Tokyo 23, JP)
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