公开(公告)号：US20220387987A1

公开(公告)日：2022-12-08

申请号：US17771673

申请日：2020-11-24

Applicant: ORGANO CORPORATION

Inventor： Yui SHIOYA ,  Miwa ITO ,  Noriko TAKADA ,  Kaoru NUKUI

IPC: B01J39/05 ,  B01J47/04

Abstract: A method for purifying a non-aqueous solvent includes: pretreating by passing a non-aqueous solvent for dehydration treatment through a packed bed of an ion exchange resin that is not yet subjected to dehydration treatment, to remove water in the ion exchange resin; and purifying by passing a non-aqueous solvent to be purified through the packed bed of the ion exchange resin from which water is removed during the pretreating, to purify the non-aqueous solvent to be purified, in which the harmonic-mean particle size of the ion exchange resin is 0.20 to 0.50 mm. According to the present application, a method for purifying a non-aqueous solvent can be provided, the method includes pretreating by removing water in a water-containing ion exchange resin by passing therethrough a non-aqueous solvent for dehydration treatment, in which the amount of the non-aqueous solvent for dehydration treatment used during the pretreating is small.

公开(公告)号：US20240238775A1

公开(公告)日：2024-07-18

申请号：US18284356

申请日：2022-02-17

Applicant: ORGANO CORPORATION

Inventor： Noriko TAKADA ,  Kaoru NUKUI

IPC: B01J47/016 ,  B01J39/05 ,  B01J49/60

CPC classification number: B01J47/016 ,  B01J39/05 ,  B01J49/60

Abstract: Provided is a method for purifying a nonaqueous liquid in a simple and cost-efficient manner, without requiring a large amount of the nonaqueous liquid, by using an ion exchange resin having a reduced water content. The method for purifying a nonaqueous liquid using an ion exchange resin includes bringing the ion exchange resin into contact with a nonaqueous liquid for pretreatment having a relative permittivity at 25° C. of 20 or higher and bringing the ion exchange resin after the pretreatment into contact with a nonaqueous liquid to be purified, wherein the relative permittivity at 25° C. of the nonaqueous liquid for pretreatment is greater than the relative permittivity at 25° C. of the nonaqueous liquid to be purified, and the concentration of metals to be reduced in the nonaqueous liquid for pretreatment is 5 μg/L or less.

公开(公告)号：US20240157354A1

公开(公告)日：2024-05-16

申请号：US18284351

申请日：2022-01-27

Applicant: ORGANO CORPORATION

Inventor： Noriko TAKADA ,  Kaoru NUKUI

IPC: B01J47/016 ,  B01J39/05 ,  B01J39/07 ,  B01J45/00

CPC classification number: B01J47/016 ,  B01J39/05 ,  B01J39/07 ,  B01J45/00

Abstract: A dry ion exchange resin manufacturing method includes: 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.

公开(公告)号：US20240018020A1

公开(公告)日：2024-01-18

申请号：US18036043

申请日：2021-09-27

Applicant: ORGANO CORPORATION

Inventor： Noriko TAKADA ,  Kaoru NUKUI ,  Haruo YOKOTA

IPC: C02F1/42 ,  B01J39/05 ,  B01J49/53 ,  C07C211/63

CPC classification number: C02F1/42 ,  B01J39/05 ,  B01J49/53 ,  C07C211/63 ,  C02F2101/38

Abstract: The present invention provides a method for purifying a liquid to be treated, the method being capable of reducing the content of metal impurities in the liquid to be treated containing tetraalkylammonium ions, and further, being capable of suppressing cracking of the resin even when a strongly acidic cation exchange resin is used. The method includes: an impurity removal step of passing a liquid to be treated that contains tetraalkylammonium ions and metal impurities through a container filled with a cation exchange resin of a hydrogen ion form or a tetraalkylammonium ion form to reduce the content of the metal impurities in the liquid to be treated, wherein the degree of cross-linking of the cation exchange resin is from 16% to 24%.