Title:
WEAK BASE ANION EXCHANGE RESIN PURIFICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2024/004452
Kind Code:
A1
Abstract:
Provided is a purification method with which it is possible to effectively reduce TOC components derived from a weak base anion exchange resin. A weak base anion exchange resin purification method is used, said purification method comprising: a reverse regeneration step in which an acidic solution is passed through a weak base anion exchange resin, causing the resin to enter a swollen state; a first rinse step in which the resin in a swollen state is rinsed using a rinse water after the reverse regeneration step; and a regeneration step in which the resin is regenerated using an alkaline aqueous solution after the first rinse step, wherein, in the first rinse step, the rinse water passes through the resin in a quantity which is at least four times the resin quantity.
Inventors:
NAKAMURA TOSHIHIRO (JP)
YOKOTA HARUO (JP)
HASHIMOTO KOICHIRO (JP)
YOKOTA HARUO (JP)
HASHIMOTO KOICHIRO (JP)
Application Number:
PCT/JP2023/019325
Publication Date:
January 04, 2024
Filing Date:
May 24, 2023
Export Citation:
Assignee:
ORGANO CORP (JP)
International Classes:
B01J49/60; B01J41/07; B01J41/14; B01J49/57
Foreign References:
| JP2018058010A | 2018-04-12 |
Attorney, Agent or Firm:
MIYAZAKI Teruo et al. (JP)
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