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    SEPARATION MEMBRANE AND LAMINATE
    3.
    发明申请
    SEPARATION MEMBRANE AND LAMINATE 审中-公开

    公开(公告)号：US20190314768A1

    公开(公告)日：2019-10-17

    申请号：US16462109

    申请日：2017-11-16

    申请人： NITTO DENKO CORPORATION

    发明人： Naomichi KIMURA ,  Terukazu IHARA ,  Katsumi ISHII ,  Akira SHIMAZU ,  Yuri ITO

    IPC分类号： B01D69/02 ,  B01D61/36 ,  B01D69/12 ,  B01D71/56

    摘要： An aspect of the present invention relates to a separation membrane for selectively separating a component (A) from a fluid containing the component (A) and a component (B), wherein the separation membrane has a first surface and a second surface opposite to the first surface, an affinity of the first surface side of the separation membrane for the component (A) is higher than an affinity of the first surface side of the separation membrane for the component (B), and an affinity of the second surface side of the separation membrane for the component (A) is higher than the affinity of the first surface side of the separation membrane for the component (A).

    PURIFICATION SYSTEM, PURIFICATION METHOD, MEMBRANE SEPARATION DEVICE, AND SOLVENT MANUFACTURING METHOD
    4.
    发明申请
    PURIFICATION SYSTEM, PURIFICATION METHOD, MEMBRANE SEPARATION DEVICE, AND SOLVENT MANUFACTURING METHOD 有权

    公开(公告)号：US20220401884A1

    公开(公告)日：2022-12-22

    申请号：US17641988

    申请日：2020-09-16

    申请人： NITTO DENKO CORPORATION

    发明人： Naomichi KIMURA ,  Yuri ITO ,  Tomoya HIRAI ,  Shinya NISHIYAMA

    IPC分类号： B01D61/58 ,  B01D61/02 ,  B01D61/08 ,  B01D61/36 ,  B01D71/02

    摘要： A purification system is for purifying a mixture containing a first solvent, a second solvent, and an impurity. The purification system includes a first membrane separation device including a pervaporation membrane and a second membrane separation device including a filtration membrane. The pervaporation membrane separates the mixture into a first permeated fluid and a first concentrated fluid. The first permeated fluid has a lower concentration of the impurity than that in the mixture, and the first concentrated fluid has a higher concentration of the impurity than that in the mixture. The filtration membrane separates the first concentrated fluid into a second permeated fluid and a second concentrated fluid. The second permeated fluid has a lower concentration of the impurity than that in the first concentrated fluid, and the second concentrated fluid has a higher concentration of the impurity than that in the first concentrated fluid.

    SEPARATION MEMBRANE AND MEMBRANE SEPARATION METHOD
    5.
    发明申请
    SEPARATION MEMBRANE AND MEMBRANE SEPARATION METHOD 有权

    公开(公告)号：US20210394129A1

    公开(公告)日：2021-12-23

    申请号：US17287274

    申请日：2019-09-25

    申请人： NITTO DENKO CORPORATION

    发明人： Yuri ITO ,  Hisae SHIMIZU ,  Makoto KATAGIRI ,  Terukazu IHARA ,  Shinya NISHIYAMA

    IPC分类号： B01D71/64 ,  B01D61/36 ,  B01D69/02 ,  B01D69/10 ,  B01D69/12 ,  B01D69/14

    摘要： The present invention provides a separation membrane suitable for separating water from a liquid mixture containing an alcohol and water. A separation membrane 10 according to the present invention contains polyimide including a structural unit represented by formula (1). A is a linking group having a solubility parameter, in accordance with a Fedors method, of more than 5.0. B is a linking group having a solubility parameter of more than 8.56. R1 to R6 each are independently a hydrogen atom, a halogen atom, a hydroxyl group, a sulfonic group, an alkoxy group having 1 to 30 carbon atoms, or a hydrocarbon group having 1 to 30 carbon atoms. Ar1 and Ar2 each are a divalent aromatic group.