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AssigneeOrgano Corporation
InventorsYasuhiro YOSHIMURA, Haruo YOKOTA, Akira NAKAMURA
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Provided is a method for producing a chelate resin, wherein a highly pure treatment liquid can be obtained by reducing the amount of metal impurities in a to-be-treated liquid containing metal impurities. The method for producing a chelate resin comprises a purification step for purifying a to-be-purified chelate resin by bringing the chelate resin into contact with at least 5 wt % of a mineral acid solution containing 1 mg/L or less of metal impurities, wherein the total amount of metal impurities eluted when 3 wt % of hydrochloric acid is passed through the purified chelate resin in an amount equal to 25 times the amount of the chelate resin by volume ratio is 5 μm/mL-R or less.
A method for producing a chelate resin, comprising purifying a chelate resin that is to be purified by bringing a mineral acid solution having a metal impurities content of not more than 1 mg/L and a concentration of at least 5% by weight into contact with the chelate resin, wherein
An apparatus for producing a chelate resin, comprising a purification unit for purifying a chelate resin that is to be purified by bringing a mineral acid solution having a metal impurities content of not more than 1 mg/L and a concentration of at least 5% by weight into contact with the chelate resin, wherein
Dependencies are inferred from the claim text.