To provide a method for repeatedly regenerating an anion exchange resin in which halogen gas is absorbed so that the resulting exchange capacity has almost the same degree of the exchange capacity of a brand-new anion exchange resin.
The method for regenerating used anion exchange resin in which halogen gas is absorbed includes a process for regenerating the used anion exchange resin with washing liquid including both an alkali compound and a reducing agent, and sets the moisture content in the regenerated anion exchange resin to be less than 5 wt.%. Use of the regeneration method can suppress deterioration during regeneration and regenerates halogen gas absorption characteristics that have almost the same degree of those of a brand-new article. Even though its use and regeneration are repeated, the exchange capacity of the anion exchange resin can be maintained to have almost the same degree of that of a brand-new article.
HIYOSHI HIROKAZU
UTSUMI KAZUO
TAKEDA TORU
Takashi Kuboyama