Title:
ACETIC ACID PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2019/229859
Kind Code:
A1
Abstract:
A method is provided of producing acetic acid with excellent potassium permanganate test values in an industrially efficient manner and without incurring high costs. This acetic acid production method involves: a carbonylation reaction step; a separation step; a recycling step; a liquid separation step; and an acetaldehyde separation and removal step in which, on the basis of the liquid temperature at the time of liquid separation in the liquid separation step, the acetaldehyde concentration of the aqueous phase and/or the organic phase, the acetaldehyde partition ratio, the methyl acetate concentration of the aqueous phase and/or the organic phase, or the methyl acetate partition ratio, a treatment target is selected from at least part of the aqueous phase and/or the organic phase and treated. In the separation step, the crotonaldehyde concentration in a first acetic acid flow is controlled to less than or equal to 2.2 ppm by mass, and the ratio (CCR/CECR) in the first acetic acid flow of the crotonaldehyde concentration CCR (ppm by mass) and the 2-ethyl-crotonaldehyde concentration CECR (ppm by mass) is adjusted.
More Like This:
Inventors:
SHIMIZU MASAHIKO (JP)
Application Number:
PCT/JP2018/020605
Publication Date:
December 05, 2019
Filing Date:
May 29, 2018
Export Citation:
Assignee:
DAICEL CORP (JP)
International Classes:
C07C51/44; C07C53/08
Domestic Patent References:
| WO2018078924A1 | 2018-05-03 | |||
| WO1996033965A1 | 1996-10-31 | |||
| WO2013137236A1 | 2013-09-19 | |||
| WO2006070632A1 | 2006-07-06 |
Foreign References:
| JPH07133249A | 1995-05-23 | |||
| JP2016117709A | 2016-06-30 | |||
| JPS53116314A | 1978-10-11 | |||
| JPH0867650A | 1996-03-12 | |||
| JP2001508405A | 2001-06-26 | |||
| JPH0725813A | 1995-01-27 | |||
| JP2006182691A | 2006-07-13 |
Other References:
See also references of EP 3594197A4
Attorney, Agent or Firm:
GOTO & CO. (JP)
Download PDF: