Title:
METHOD AND APPARATUS FOR PRODUCING CHELATE RESIN, AND METHOD FOR PURIFYING TO-BE-TREATED LIQUID
Document Type and Number:
WIPO Patent Application WO/2019/163499
Kind Code:
A1
Abstract:
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.
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Inventors:
YOSHIMURA YASUHIRO (JP)
YOKOTA HARUO (JP)
NAKAMURA AKIRA (JP)
YOKOTA HARUO (JP)
NAKAMURA AKIRA (JP)
Application Number:
PCT/JP2019/003864
Publication Date:
August 29, 2019
Filing Date:
February 04, 2019
Export Citation:
Assignee:
ORGANO CORP (JP)
International Classes:
B01J45/00; B01D15/36
Domestic Patent References:
| WO2008133322A1 | 2008-11-06 |
Foreign References:
| JPH06298529A | 1994-10-25 | |||
| JP2008031014A | 2008-02-14 | |||
| JPH10245640A | 1998-09-14 |
Attorney, Agent or Firm:
YKI INTELLECTUAL PROPERTY ATTORNEYS (JP)
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