Method and device for producing dried ion exchange resin, and method and device for purifying liquid to be treated

• Main Authors: NUKUI KAORU, TAKADA TOMOKO
• Format: Patent
• Language: Chinese; English
• Published: 17.11.2023
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention provides a method and a device for producing a dry ion exchange resin, and a method and a device for purifying a liquid to be treated using the dry ion exchange resin. The method for producing a dry ion exchange resin is capable of obtaining a dry ion exchange resin having a reduced moisture content and a reduced metal content. A method for producing a dried ion exchange resin, the method comprising: a purification step for obtaining a purified cation exchange resin by bringing an inorganic acid solution having a metal impurity content of 1 mg/L or less and a concentration of 5 wt% or more into contact with a cation exchange resin to be purified, and purifying the cation exchange resin, the total elution amount of metal impurities eluted when hydrochloric acid at a concentration of 3 wt% passes through the purified cation exchange resin in an amount of 25 times the volume ratio is 5 [mu] g/mL-R or less; in the drying step, the purified cation exchange resin is dried under reduced pressure at 80