Title:
DRY ION EXCHANGE RESIN MANUFACTURING METHOD AND MANUFACTURING DEVICE, AND TREATED LIQUID PURIFYING METHOD AND PURIFYING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/209233
Kind Code:
A1
Abstract:
Provided are a dry ion exchange resin manufacturing method and manufacturing device with which it is possible to obtain a dry ion exchange resin having a reduced moisture content and metal content, and a treated liquid purifying method and purifying device employing the dry ion exchange resin. This dry ion exchange resin manufacturing method includes: a purifying step for obtaining a purified cation exchange resin by bringing a cation exchange resin to be purified into contact with a mineral acid solution having a metal impurity content of 1 mg/L or less and a concentration of 5% by weight or more, to purify the cation exchange resin, wherein a total metal impurity elution amount eluted when hydrochloric acid having a concentration of 3% by weight is passed through the purified cation exchange resin with a volume ratio of 25 times is at most equal to 5 μg/mL-R; and a drying step of drying the purified cation exchange resin under reduced pressure at 80°C or lower until the moisture content is at most equal to 5% by weight.
Inventors:
TAKADA NORIKO (JP)
NUKUI KAORU (JP)
NUKUI KAORU (JP)
Application Number:
PCT/JP2022/003045
Publication Date:
October 06, 2022
Filing Date:
January 27, 2022
Export Citation:
Assignee:
ORGANO CORP (JP)
International Classes:
B01J45/00; B01J39/05; B01J39/07; B01J39/20; B01J47/016
Foreign References:
| JP2007117781A | 2007-05-17 | |||
| JP2019141800A | 2019-08-29 | |||
| JP2004181351A | 2004-07-02 | |||
| JP2004249238A | 2004-09-09 | |||
| JP2003026251A | 2003-01-29 | |||
| JP2012081411A | 2012-04-26 | |||
| US20030150814A1 | 2003-08-14 | |||
| JPH11171508A | 1999-06-29 | |||
| JPS61171507A | 1986-08-02 |
Attorney, Agent or Firm:
YKI INTELLECTUAL PROPERTY ATTORNEYS (JP)
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