公开(公告)号：US20240100487A1

公开(公告)日：2024-03-28

申请号：US18269385

申请日：2021-12-24

Applicant: TORAY INDUSTRIES, INC.

Inventor： Harutoki SHIMURA ,  Takaaki YASUDA ,  Shinya MITSUI

IPC: B01D69/12 ,  B01D69/02 ,  B01D69/10 ,  B01D71/56

CPC classification number: B01D69/12 ,  B01D69/02 ,  B01D69/10 ,  B01D71/56 ,  B01D2325/43

Abstract: A composite semipermeable membrane, including: a microporous support layer; and a separation functional layer provided on the microporous support layer, in which the separation functional layer includes a crosslinked wholly aromatic polyamide which is a polycondensation product of a polyfunctional aromatic amine and a polyfunctional aromatic acid chloride and contains amino groups and carboxyl groups, and in positive secondary ions measured on a surface of the separation functional layer by time-of-flight secondary ion mass spectrometry, when (count number of m/z=104.03)/(count number of m/z=108.06) is denoted by a, and a molar ratio (carboxyl group/amino group) of the carboxyl group to the amino group, which is obtained by analyzing the entire separation functional layer by 13C solid state NMR, is denoted by b, the following formulae (1) and (2) are satisfied: a≥5.0 (1); and a/b≥4.3 (2).

公开(公告)号：US20250065275A1

公开(公告)日：2025-02-27

申请号：US18724808

申请日：2022-12-26

Applicant: TORAY INDUSTRIES, INC.

Inventor： Shinya MITSUI ,  Kumiko OGAWA ,  Izumi NAGANO ,  Harutoki SHIMURA

IPC: B01D67/00 ,  B01D69/10 ,  B01D71/56 ,  C02F1/44 ,  C02F103/08

Abstract: The present invention relates to a composite semipermeable membrane including: a microporous support layer; and a separation functional layer provided on the microporous support layer, in which the separation functional layer includes a crosslinked aromatic polyamide having a particular partial structure. The separation functional layer may have a ratio of (molar equivalent of amino groups+molar equivalent of carboxy groups)/(molar equivalent of amide groups) of 0.56 or less as measured by a DD-MAS-13C solid state NMR method.

公开(公告)号：US20230001363A1

公开(公告)日：2023-01-05

申请号：US17772608

申请日：2020-10-30

Applicant: TORAY INDUSTRIES, INC.

Inventor： Takaaki YASUDA ,  Yohei ADACHI ,  Shinya MITSUI ,  Harutoki SHIMURA ,  Takafumi OGAWA

IPC: B01D71/82 ,  B01D69/02 ,  B01D69/10 ,  B01D69/12 ,  B01D71/56

Abstract: The present invention relates to a composite semipermeable membrane including: a support membrane including a base and a porous support layer; and a separation functional layer disposed on the porous support layer and including a crosslinked aromatic polyamide, in which the separation functional layer contains sulfo groups in an amount of 7.0×10−5 to 5.0×10−2 g/m2 and includes a structure represented by the formula 1.