Title:
METHOD FOR PRODUCING ACETIC ACID
Document Type and Number:
WIPO Patent Application WO/2014/097867
Kind Code:
A1
Abstract:
Provided is a method for efficiently removing acetaldehyde and producing high-purity acetic acid in a stable manner. Methanol and carbon monoxide are reacted continuously in a carbonylation reactor (1) in the presence of a catalyst system, the reaction mixture is supplied continuously to a flasher (2), and a volatile phase (2A) containing acetic acid and methyl iodide is produced. The volatile phase (2A) is supplied continuously to a splitter column (3) and separated into overhead (3A) containing methyl iodide and acetaldehyde, and flow fraction (3B) containing acetic acid. The volatile phase (2A) and/or overhead (3A) are cooled by first condensers (C1, C3) having a predetermined cooling temperature, the uncondensed gas component is further cooled by second condensers (C2, C4) and condensed, the temperature is lowered further, and a concentrate in which acetaldehyde has been concentrated to a high concentration is produced. The high-concentration acetaldehyde concentrate is distilled by a distillation column (6), and the acetaldehyde is efficiently removed.
Inventors:
SHIMIZU MASAHIKO (JP)
SAITO RYUJI (JP)
MIURA HIROYUKI (JP)
SAITO RYUJI (JP)
MIURA HIROYUKI (JP)
Application Number:
PCT/JP2013/082334
Publication Date:
June 26, 2014
Filing Date:
December 02, 2013
Export Citation:
Assignee:
DAICEL CORP (JP)
International Classes:
C07C51/12; B01J31/16; C07C51/44; C07C53/08; C07B61/00
Domestic Patent References:
| WO2012046593A1 | 2012-04-12 | |||
| WO2010053571A2 | 2010-05-14 |
Foreign References:
| JP2012508166A | 2012-04-05 | |||
| JP2001508405A | 2001-06-26 | |||
| JP2012046490A | 2012-03-08 | |||
| JPH08245491A | 1996-09-24 | |||
| JPH04266843A | 1992-09-22 | |||
| JPH0867650A | 1996-03-12 |
Other References:
See also references of EP 2937329A4
Attorney, Agent or Firm:
KUWATA Mitsuo et al. (JP)
Atsuo Kuwata (JP)
Atsuo Kuwata (JP)
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