公开(公告)号：US20240382907A1

公开(公告)日：2024-11-21

申请号：US18693578

申请日：2022-09-26

Applicant: TORAY INDUSTRIES, INC.

Inventor： Kumiko OGAWA ,  Harutoki SHIMURA ,  Takafumi OGAWA

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

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 plurality of protrusions formed of a thin membrane including a cross-linked aromatic polyamide, in arbitrary ten cross sections perpendicular to a membrane surface direction and having a length of 2.0 μm in the membrane surface direction, an average number density of the protrusions whose height with respect to a surface of the support layer as reference is one-fifth or more of a ten-point average surface roughness of the separation functional layer is 13.0 protrusions/μm or more, and an average value of a deformation amount when the protrusions are pressed with a force of 5 nN is 2.2 nm or less, and a standard deviation of the deformation amount is 1.2 nm or less.

公开(公告)号：US20200062616A1

公开(公告)日：2020-02-27

申请号：US16489278

申请日：2018-02-28

Applicant: TORAY INDUSTRIES, INC.

Inventor： Ryoma MIYAMOTO ,  Keisuke YONEDA ,  Kumiko OGAWA ,  Satoko KANAMORI ,  Ryuichiro HIRANABE ,  Yoichiro KOZAKI

IPC: C02F1/42 ,  B01D15/36 ,  B32B5/02 ,  B32B5/26 ,  B01J47/127 ,  B01J39/07 ,  B01J39/20

Abstract: The present invention provides a filter which, even when raw water is subjected to high-speed treatment, enables achieving a high solute rejection ratio and a long solute filtration life and which exhibits a low water flow resistance. The present invention pertains to a filter obtained by laminating woven fabrics or knitted fabrics, the filter being characterized in that: said woven fabrics or knitted fabrics comprise a fiber capable of adsorbing components dissolved in liquid: said fiber has a diameter of 100-600 μm; the woven fabrics or knitted fabrics have a porosity of 15-70%; and variation in area porosity in the thickness direction of the laminate is 15% or less.

公开(公告)号：US20190247800A1

公开(公告)日：2019-08-15

申请号：US16065563

申请日：2016-12-22

Applicant: TORAY INDUSTRIES, INC.

Inventor： Kumiko OGAWA ,  Harutoki SHIMURA ,  Takao SASAKI

IPC: B01D69/02 ,  B01D69/12 ,  B01D71/56 ,  C02F1/44 ,  C08G69/32 ,  C08G69/48

CPC classification number: B01D69/02 ,  B01D67/0093 ,  B01D69/12 ,  B01D69/125 ,  B01D71/56 ,  B01D2323/08 ,  B01D2325/06 ,  B01D2325/20 ,  B01D2325/30 ,  B32B27/34 ,  C02F1/44 ,  C02F2103/08 ,  C08G69/32 ,  C08G69/48 ,  C08G2340/00

Abstract: The present invention provides a composite semipermeable membrane which has practicable water permeability and high acid resistance. The present invention relates to a composite semipermeable membrane including a supporting membrane and a separation functional layer disposed on the supporting membrane, in which the separation functional layer includes a crosslinked aromatic polyamide and has a protuberance structure including protrusions and recesses, a proportion in number of protrusions each having a height of 100 nm or larger is 80% or larger in the protrusions of the protuberance structure, and the separation functional layer contains amino groups, carboxy groups, and amide groups and satisfies y/x≤0.81, in which x is the molar ratio of carboxy groups/amide groups and y is the molar ratio of amino groups/amide groups.

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：US20220212962A1

公开(公告)日：2022-07-07

申请号：US17606266

申请日：2020-04-24

Applicant: TORAY INDUSTRIES, INC.

Inventor： Kumiko OGAWA ,  Harutoki SHIMURA ,  Shigehisa HANADA

IPC: C02F1/44 ,  B01D61/02 ,  C02F1/42 ,  B01D71/56 ,  B01D69/10 ,  B01D69/02 ,  A61M1/16

Abstract: The present invention relates to a dialysate regeneration method that reduces a urea concentration of a urea-containing aqueous solution, the method including a reverse osmosis process of obtaining, from the urea-containing aqueous solution, a concentrate having a higher urea concentration and a permeate having a lower urea concentration by using a reverse osmosis membrane element at an operating pressure of 0.5 MPa or more and 2.0 MPa or less, in which the urea concentration of the urea-containing aqueous solution is 0.5 g/L or more, the reverse osmosis membrane element includes a reverse osmosis membrane, and the reverse osmosis membrane has a pore diameter of 7.0 Å or less as measured by a positron annihilation lifetime measurement method.