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Patent Searching and Data


Title:
PROCESS FOR PRODUCING ACETIC ACID
Document Type and Number:
WIPO Patent Application WO/2016/194850
Kind Code:
A1
Abstract:
Provided is a process for producing acetic acid by efficiently separating permanganic-acid reducing substances (PRC's) and methyl iodide. A mixture (3A) containing PRC's and methyl iodide is distilled in a distillation step (5) to separate the mixture into an overhead stream (5A), a side-cut stream (5B), and a bottom stream (5C), thereby separating or removing the PRC's from the mixture. In the distillation step (5), an extractant (water, etc.) capable of extracting the PRC's preferentially to methyl iodide is added to a concentration region where the PRC's and methyl iodide are concentrated in the distillation tower, and an extract descending from the concentration region is withdrawn as the side-cut stream (5B).

Inventors:
SHIMIZU Masahiko (1239 Shinzaike, Aboshi-ku, Himeji-sh, Hyogo 83, 〒6711283, JP)
MIURA Hiroyuki (1239 Shinzaike, Aboshi-ku, Himeji-sh, Hyogo 83, 〒6711283, JP)
MIZUTANI Yoshihisa (1239 Shinzaike, Aboshi-ku, Himeji-sh, Hyogo 83, 〒6711283, JP)
Application Number:
JP2016/065822
Publication Date:
December 08, 2016
Filing Date:
May 27, 2016
Export Citation:
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Assignee:
DAICEL CORPORATION (3-1 Ofuka-cho, Kita-ku Osaka-sh, Osaka 11, 〒5300011, JP)
International Classes:
C07C17/386; C07C19/07; C07C51/12; C07C51/44; C07C53/08; C07B61/00
Foreign References:
JP2003518053A2003-06-03
JPH0867650A1996-03-12
JP2001096102A2001-04-10
Other References:
See also references of EP 3257833A4
Attorney, Agent or Firm:
KUWATA Mitsuo et al. (KUWATA & CO, 6th Floor Minato Umeda Building, 3-17, Nishitemma 6-chome, Kita-ku, Osaka-sh, Osaka 47, 〒5300047, JP)
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