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Title:
METHOD FOR PRODUCING PURIFIED ACETIC ACID
Document Type and Number:
WIPO Patent Application WO/2021/200785
Kind Code:
A1
Abstract:
Provided is a method for energy-efficiently producing purified acetic acid from a mixed solution comprising acetic acid, an organic solvent, and water.　The method, which is for producing purified acetic acid from a mixed solution comprising acetic acid, an organic solvent, and water, comprises a distillation step in which the mixed solution is distilled and separated into a purified liquid rich with acetic acid and a separated liquid rich with the organic solvent and a membrane separation step in which the water is separated from the purified liquid by means of a separation membrane, the purified liquid having a water concentration of 4 wt% or less.

Inventors:
TAKEDA KAZUHITO (JP)
FUKUI NAOYUKI (JP)
DEBA MIDUKI (JP)
Application Number:
PCT/JP2021/013187
Publication Date:
October 07, 2021
Filing Date:
March 29, 2021
Export Citation:
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Assignee:
DAICEL CORP (JP)
International Classes:
C07C51/42; C07C51/44; C07C53/08
Foreign References:
JP2019131526A2019-08-08
JPH09151158A1997-06-10
JP2013188687A2013-09-26
JP2020063081A2020-04-23
JPH0948744A1997-02-18
JPH10114699A1998-05-06
JPH02111404A1990-04-24
JP2014226573A2014-12-08
Other References:
See also references of EP 4129968A1
Attorney, Agent or Firm:
GOTO & CO. (JP)
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