Title:
ACETIC ACID PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2012/081417
Kind Code:
A1
Abstract:
A method for producing acetic acid while inhibiting the generation or increase in concentration of hydrogen iodide in a flash evaporation chamber. A serial acetic acid production process comprises: a reaction step in which methanol and carbon monoxide are continuously reacted in a carbonylation reactor in the presence of a catalyst system comprising a metal catalyst, an ionic iodide and methyl iodide; a flash evaporation step in which the reaction mixture is continuously supplied to a flasher from the reactor, and flash evaporation is used to evaporate a volatile component comprising at least the generated acetic acid, methyl acetate, and methyl iodide; and an acetic acid collection step in which a fluid containing the acetic acid is separated from the volatile component, and the acetic acid is collected. In the aforementioned flash evaporation step, the aforementioned volatile component is separated from the aforementioned reaction mixture, and flash evaporation is carried out under conditions in which the content concentration of the methyl acetate in the catalyst solution comprising at least a metal catalyst and an ionic iodide is 0.6 wt% or more.
Inventors:
SHIMIZU MASAHIKO (JP)
SAITO RYUJI (JP)
MIURA HIROYUKI (JP)
UENO TAKASHI (JP)
NAKAJIMA HIDEHIKO (JP)
SAITO RYUJI (JP)
MIURA HIROYUKI (JP)
UENO TAKASHI (JP)
NAKAJIMA HIDEHIKO (JP)
Application Number:
PCT/JP2011/077845
Publication Date:
June 21, 2012
Filing Date:
December 01, 2011
Export Citation:
Assignee:
DAICEL CORP (JP)
SHIMIZU MASAHIKO (JP)
SAITO RYUJI (JP)
MIURA HIROYUKI (JP)
UENO TAKASHI (JP)
NAKAJIMA HIDEHIKO (JP)
SHIMIZU MASAHIKO (JP)
SAITO RYUJI (JP)
MIURA HIROYUKI (JP)
UENO TAKASHI (JP)
NAKAJIMA HIDEHIKO (JP)
International Classes:
C07C51/44; B01J23/46; C07C51/12; C07C53/08; C07B61/00
Domestic Patent References:
| WO2002068374A1 | 2002-09-06 | |||
| WO2002062740A1 | 2002-08-15 |
Foreign References:
| JPH06321847A | 1994-11-22 | |||
| JP2001151715A | 2001-06-05 | |||
| JPS54160313A | 1979-12-19 | |||
| JPH0940590A | 1997-02-10 | |||
| JP2006160645A | 2006-06-22 | |||
| JPH0640998A | 1994-02-15 | |||
| JP3616400B2 | 2005-02-02 |
Other References:
See also references of EP 2653460A4
Attorney, Agent or Firm:
KUWATA Mitsuo et al. (JP)
Atsuo Kuwata (JP)
Atsuo Kuwata (JP)
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Claims: