Title:
CATION-EXCHANGE RESIN REGENERATION LIQUID
Document Type and Number:
Japanese Patent JP2021171710
Kind Code:
A
Abstract:
To provide a cation-exchange resin that enables separation of a hardness component contained in tap water by exchange with sodium ions which suppresses a used amount of a treatment liquid for regeneration, and enhances a regeneration rate.SOLUTION: A regeneration liquid of a cation-exchange resin that enables separation of a hardness component contained in tap water by exchange with sodium ions contains water, and sodium chloride dissolved in the water and an organic acid salt. The organic acid salt is sodium malate, sodium citrate and sodium lactate, which can be coordinated relative to the hardness component, and its concentration is set to be at least 0.01 mol/L. The cation-exchange resin is treated with a treatment liquid of 0.5-twice larger than that of its volume, and thereby the cation-exchange resin is reproduced at high rate.SELECTED DRAWING: None
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Inventors:
MIYAUCHI YUKO
MATSUTOMO SHINJI
MATSUTOMO SHINJI
Application Number:
JP2020077795A
Publication Date:
November 01, 2021
Filing Date:
April 24, 2020
Export Citation:
Assignee:
MIURA KOGYO KK
International Classes:
B01J39/05; B01J49/53; B01J39/19; C02F1/42
Attorney, Agent or Firm:
Tsunehiko Ichikawa