公开(公告)号：US20190118144A1

公开(公告)日：2019-04-25

申请号：US16091918

申请日：2017-04-13

Applicant: ASTOM Corporation

Inventor： Masayuki KISHINO ,  Kouta YUZUKI ,  Kenji FUKUTA

IPC: B01D61/44 ,  B01J47/12 ,  B01J39/04 ,  B01J39/20 ,  B01J41/04 ,  B01J41/14 ,  C08J5/22 ,  B01D61/46 ,  B01D69/02 ,  B01D69/12 ,  B01D71/28

Abstract: A bipolar membrane in which a cation-exchange membrane and an anion-exchange membrane are joined to each other, wherein a leakage ratio of gluconic acid at 60° C. is not more than 1.0%, and the cation-exchange membrane is supported by a polyolefin reinforcing member and, further, contains a polyvinyl chloride.

公开(公告)号：US20210187446A1

公开(公告)日：2021-06-24

申请号：US17196228

申请日：2021-03-09

Applicant: ASTOM Corporation

Inventor： Maki KINOSHITA ,  Masayuki KISHINO ,  Shunichiro NAKATSUKASA ,  Kenji FUKUTA

IPC: B01D71/28 ,  B01D71/26 ,  B01D67/00 ,  C08J5/22 ,  B01J47/12 ,  B01D69/02 ,  B01D69/14

Abstract: A polymerizable composition for forming an ion-exchange resin precursor, the polymerizable composition containing a monomer component and polyethylene particles in an amount of 50 to 120 parts by mass per 100 parts by mass of the monomer component, wherein the monomer component contains an aromatic monomer for introducing ion-exchange groups and a nitrogen-containing aliphatic monomer, the nitrogen-containing aliphatic monomer being present in an amount of 10 to 35% by mass in said monomer component. An ion-exchange membrane is produced by applying the polymerizable composition onto a polyolefin type filament base material and polymerizing the polymerizable composition to form an ion-exchange resin precursor and, thereafter, introducing ion-exchange groups into the precursor.

公开(公告)号：US20230119424A1

公开(公告)日：2023-04-20

申请号：US17912421

申请日：2021-03-12

Applicant: ASTOM CORPORATION

Inventor： Takaaki OKAMURA ,  Masayuki KISHINO ,  Kenji FUKUTA

IPC: B01D69/02 ,  B01D71/28 ,  B01D69/10 ,  B01D69/12 ,  B01J47/127 ,  B01J41/14 ,  B01J41/05 ,  C08J5/22

Abstract: An anion-exchange membrane of the present invention includes a substrate made of polyolefin-based woven fabric and an anion-exchange resin, and has an electrical resistance measured using 0.5 M NaCl solution at 25° C. of 1.0 Ω•cm2 or more to 2.5 Ω•cm2 or less, a bursting strength of 0.7 MPa or more to 1.2 MPa or less, a water permeation rate measured using pressured water at 0.1 MPa of 300 ml/(m2•hr) or less, a thickness of the substrate of 90 µm or more to 160 µm or less, and an open area ratio of the substrate of 35% or more to 55% or less.

公开(公告)号：US20190176098A1

公开(公告)日：2019-06-13

申请号：US16326009

申请日：2017-08-30

Applicant: ASTOM Corporation

Inventor： Maki KINOSHITA ,  Masayuki KISHINO ,  Shunichiro NAKATSUKASA ,  Kenji FUKUTA

IPC: B01D71/28 ,  B01D61/46 ,  B01D69/02 ,  B01D69/14 ,  B01J47/12

Abstract: A polymerizable composition for forming an ion-exchange resin precursor, the polymerizable composition containing a monomer component and polyethylene particles in an amount of 50 to 120 parts by mass per 100 parts by mass of the monomer component, wherein the monomer component contains an aromatic monomer for introducing ion-exchange groups and a nitrogen-containing aliphatic monomer, the nitrogen-containing aliphatic monomer being present in an amount of 10 to 35% by mass in said monomer component. An ion-exchange membrane is produced by applying the polymerizable composition onto a polyolefin type filament base material and polymerizing the polymerizable composition to form an ion-exchange resin precursor and, thereafter, introducing ion-exchange groups into the precursor.

公开(公告)号：US20230166219A1

公开(公告)日：2023-06-01

申请号：US17912469

申请日：2021-03-08

Applicant: ASTOM CORPORATION

Inventor： Naoto TAKASHINA ,  Masayuki KISHINO ,  Kenji FUKUTA

IPC: B01D67/00 ,  B01D69/10 ,  B01D71/30 ,  B01D69/02 ,  B01D71/28 ,  C08J5/22 ,  B01J39/05 ,  B01J39/20 ,  B01J47/127

CPC classification number: B01D67/0006 ,  B01D69/1071 ,  B01D71/301 ,  B01D69/02 ,  B01D71/281 ,  C08J5/2243 ,  B01J39/05 ,  B01J39/20 ,  B01J47/127 ,  B01D2325/24 ,  B01D2325/26 ,  B01D2325/42 ,  B01D2325/22 ,  C08J2325/12 ,  C08J2427/06 ,  C08J2423/06

Abstract: A cation-exchange membrane using a polyolefin-based substrate with reduced swelling of an ion-exchange resin and a low electrical resistance is provided. The cation-exchange membrane of the present invention includes a substrate made of polyolefin-based woven fabric, and a sulfonic acid group-containing cation-exchange resin. A portion of the cation-exchange membrane other than the substrate has 23 mass % or more to 35 mass % or less of polyvinyl chloride.

公开(公告)号：US20230067288A1

公开(公告)日：2023-03-02

申请号：US17982998

申请日：2022-11-08

Applicant: ASTOM Corporation

Inventor： Masayuki KISHINO ,  Kouta YUZUKI ,  Kenji FUKUTA

IPC: B01D61/44 ,  B01J47/12 ,  B01D61/46 ,  C08J5/22 ,  C25B13/02 ,  C25B13/08 ,  B01D69/02 ,  B01D69/12 ,  B01D71/28 ,  B01J39/04 ,  B01J39/20 ,  B01J41/04 ,  B01J41/14

Abstract: A bipolar membrane in which a cation-exchange membrane and an anion-exchange membrane are joined to each other, wherein a leakage ratio of gluconic acid at 60° C. is not more than 1.0%, and the cation-exchange membrane is supported by a polyolefin reinforcing member and, further, contains a polyvinyl chloride.

公开(公告)号：US20240399319A1

公开(公告)日：2024-12-05

申请号：US18687624

申请日：2022-08-24

Applicant: ASTOM Corporation ,  TOKUYAMA CORPORATION

Inventor： Kazuo MIZUGUCHI ,  Nobuhiko OHMURA ,  Masayuki KISHINO ,  Michihito NAKATANI

IPC: B01D71/60

Abstract: The present invention provides an anion exchange membrane that has low electrical resistance when used in electrodialysis, is produced without an increase in cost, and is excellent in selective permeability to monovalent anions, and a method for producing the same. The anion exchange membrane has a tertiary amino group and a quaternary ammonium group as functional groups, such that an intensity ratio of the tertiary amino group to the quaternary ammonium group is 1.0 or more as measured by X-ray photoelectron spectroscopy on a surface of the anion exchange membrane having the tertiary amino group and the quaternary ammonium group as the functional groups.

公开(公告)号：US20240181403A1

公开(公告)日：2024-06-06

申请号：US18283637

申请日：2021-12-27

Applicant: ASTOM Corporation

Inventor： Maki KINOSHITA ,  Masayuki KISHINO ,  Kenji FUKUTA

IPC: B01D69/12 ,  B01D71/26 ,  B01D71/28 ,  B01D71/30

CPC classification number: B01D69/125 ,  B01D71/261 ,  B01D71/283 ,  B01D71/301 ,  B01D2325/04 ,  B01D2325/16 ,  B01D2325/42

Abstract: An anion exchange membrane includes an anion exchange resin layer 3 reinforced with a backing material sheet 5. The anion exchange resin layer 3 includes an anion exchange resin that has as an anion exchange group a pyridinium group formed by protonation of a pyridyl group, and a vinyl chloride resin as a thickener. The backing material sheet 5 is made of a polyethylene woven fabric.