Invention Application
- Patent Title: METHOD FOR PRODUCING PURIFIED ACETIC ACID
-
Application No.: US17913973Application Date: 2021-03-22
-
Publication No.: US20230123364A1Publication Date: 2023-04-20
- Inventor: Yasuhiro KIKUCHI , Takahito MITOME , Naoyuki FUKUI , Kazuhito TAKEDA
- Applicant: DAICEL CORPORATION
- Applicant Address: JP Osaka-shi, Osaka
- Assignee: DAICEL CORPORATION
- Current Assignee: DAICEL CORPORATION
- Current Assignee Address: JP Osaka-shi, Osaka
- Priority: JP2020-056079 20200326
- International Application: PCT/JP2021/011666 WO 20210322
- Main IPC: C07C51/47
- 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.
Information query