Title:
ELECTRODIALYSIS METHOD USING BIPOLAR MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2022/209641
Kind Code:
A1
Abstract:
This bipolar electrodialysis method, which is for generating acid and alkali from a salt using an electrodialyzer in which a bipolar membrane BP and a cation exchange membrane C are disposed between a positive electrode 10 and a negative electrode 11, is characterized in that an alkaline chamber, which faces an anion exchanger a of the bipolar membrane BP, is acid-washing with an acid aqueous solution having a pH of at most 3.5 when the energization of the electrodialyzer is stopped.
Inventors:
DOI SHOICHI (JP)
KINOSHITA MAKI (JP)
KINOSHITA MAKI (JP)
Application Number:
PCT/JP2022/010110
Publication Date:
October 06, 2022
Filing Date:
March 08, 2022
Export Citation:
Assignee:
ASTOM CORP (JP)
International Classes:
B01D61/46; B01D65/06; C02F1/469
Foreign References:
| JP2010269288A | 2010-12-02 | |||
| JP2018051453A | 2018-04-05 | |||
| JP2002308618A | 2002-10-23 | |||
| JP2003164751A | 2003-06-10 | |||
| JPH05285346A | 1993-11-02 |
Attorney, Agent or Firm:
ONO, Hisazumi et al. (JP)
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