公开(公告)号：US20220234037A1

公开(公告)日：2022-07-28

申请号：US17606213

申请日：2020-04-01

Applicant: ORGANO CORPORATION

Inventor： Noriko TAKADA ,  Haruo YOKOTA ,  Yui SHIOYA ,  Yasuhiro YOSHIMURA

IPC: B01J47/028 ,  B01J41/14 ,  B01J47/04 ,  B01J39/19

Abstract: A method for purifying an organic solvent has a first treatment of bringing an organic solvent to be treated into contact with an H-type cation exchanger, and a second treatment of bringing a treated liquid from the first treatment into contact with an anion exchanger and an H-type strongly acidic cation exchanger. According to the present application, the provided method and an apparatus for purifying an organic solvent remove metal impurities of both metal species of monovalent and polyvalent metals in the organic solvent.

公开(公告)号：US20200369795A1

公开(公告)日：2020-11-26

申请号：US16969827

申请日：2019-02-04

Applicant: ORGANO CORPORATION

Inventor： Yasuhiro YOSHIMURA ,  Haruo YOKOTA ,  Akira NAKAMURA

IPC: C08F8/40 ,  B01J45/00 ,  C08F212/14

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.