公开(公告)号：US20230123364A1

公开(公告)日：2023-04-20

申请号：US17913973

申请日：2021-03-22

Applicant: DAICEL CORPORATION

Inventor： Yasuhiro KIKUCHI ,  Takahito MITOME ,  Naoyuki FUKUI ,  Kazuhito TAKEDA

IPC: C07C51/47 ,  B01J39/05 ,  B01J39/20

Abstract: Provided is a method for producing purified acetic acid with a good hue. A method for producing purified acetic acid, including treating acetic acid having a poor hue with a synthetic adsorbent to obtain acetic acid with an improved hue. The acetic acid to be treated is, for example, acetic acid having an absorbance of 0.01 or greater at a wavelength of 430 nm. The acetic acid to be treated may be acetic acid recovered from an acetic acid-containing solution that is discharged in a cellulose acetate production process. The synthetic adsorbent may have a cation exchange group on a resin surface. The synthetic adsorbent may have a pore structure.