公开(公告)号：US20200171436A1

公开(公告)日：2020-06-04

申请号：US16087398

申请日：2017-03-24

申请人： KURITA WATER INDUSTRIES LTD. ,  ASAHI KASEI KABUSHIKI KAISHA

发明人： Takahiro KAWAKATSU ,  Hideaki IINO ,  Masayuki KANEDA ,  Daisuke SATO

IPC分类号： B01D61/18 ,  B01D61/14 ,  B01D61/20 ,  B01D63/02 ,  B01D69/02 ,  C02F9/00

摘要： The ultrapure-water production system includes an auxiliary treatment apparatus and a dead-end filtration apparatus. The auxiliary treatment apparatus treats water such that the number of microparticles present in water treated by the auxiliary treatment apparatus is 800 to 1200 particles/mL. The dead-end filtration apparatus includes a filtration membrane that is a microfiltration membrane having pores formed in the surface of the membrane at an opening ratio of 50% to 90% with a size of 0.05 to 1 μm, and having a thickness of 0.1 to 1 mm, or an ultrafiltration membrane having pores formed in the surface of the membrane with a size of 0.005 to 0.05 μm, the number of the pores being 1E13 to 1E15 pores/m2, the ultrafiltration membrane having a thickness of 0.1 to 1 mm and a transmembrane pressure of 0.02 to 0.10 MPa at a permeation flux of 10 m3/m2/d.

公开(公告)号：US20190111391A1

公开(公告)日：2019-04-18

申请号：US16087435

申请日：2017-03-24

申请人： KURITA WATER INDUSTRIES LTD. ,  ASAHI KASEI KABUSHIKI KAISHA

发明人： Hideaki IINO ,  Koji NAKATA ,  Masayuki KANEDA ,  Daisuke SATO

IPC分类号： B01D61/14 ,  B01D71/56 ,  B01D71/68 ,  B01J41/07 ,  B01J41/13 ,  B01J41/14 ,  B01J47/12 ,  B01D61/18 ,  B01D61/22 ,  B01F1/00

摘要： A wet cleaning apparatus that cleans an item with carbon dioxide gas-dissolved water produced by dissolving carbon dioxide gas in ultrapure water, the wet cleaning apparatus including: a carbon dioxide gas-dissolving unit that dissolves carbon dioxide gas in ultrapure water; a cleaning unit that cleans an item, the cleaning unit receiving carbon dioxide gas-dissolved water fed from the carbon dioxide gas-dissolving unit; and a filtration membrane module disposed on a pipe through which the carbon dioxide gas-dissolved water is fed to the cleaning unit, the filtration membrane module being filled with a porous membrane including a cationic functional group.

公开(公告)号：US20180044205A1

公开(公告)日：2018-02-15

申请号：US15552434

申请日：2016-02-22

申请人： KURITA WATER INDUSTRIES LTD. ,  ASAHI KASEI KABUSHIKI KAISHA

发明人： Takahiro KAWAKATSU ,  Hideaki IINO ,  Takeo FUKUI ,  Masayuki KANEDA ,  Daisuke SATO

IPC分类号： C02F1/44 ,  B01D61/14 ,  B01J47/12 ,  B01J41/13 ,  C08J5/22 ,  B01D71/72 ,  B01D69/02

CPC分类号： C02F1/444 ,  B01D61/14 ,  B01D61/142 ,  B01D61/145 ,  B01D61/147 ,  B01D61/16 ,  B01D61/18 ,  B01D69/02 ,  B01D71/72 ,  B01D2311/2623 ,  B01D2311/2634 ,  B01D2325/16 ,  B01D2325/42 ,  B01J41/07 ,  B01J41/13 ,  B01J47/12 ,  C02F2103/04 ,  C08J5/2256 ,  C08J5/2275 ,  C08J2329/12 ,  C08J2365/00

摘要： In a subsystem or water-feed path located upsteam of a use point in an ultrapure water production/supply process, fine particles having a particle diameter of 50 nm or less, in particular 10 nm or less are highly removed. A device for removing fine particles in water has a membrane filtration device including a microfiltration membrane or an ultrafiltration membrane having a weak cationic functional group. The microfiltration membrane or the ultrafiltration membrane having a weak cationic functional group is preferred to have a polyketone film with the weak cationic functional group. Negatively-charged particles in water are adsorbed by the weak cationic functional group and can thus be removed.

公开(公告)号：US20170225131A1

公开(公告)日：2017-08-10

申请号：US15500838

申请日：2015-08-10

申请人： ASAHI KASEI KABUSHIKI KAISHA ,  NATIONAL UNIVERSITY CORP. KOBE UNIVERSITY

发明人： Toru MORITA ,  Masayuki KANEDA ,  Masahiro YASUKAWA ,  Hideto MATSUYAMA

IPC分类号： B01D71/56 ,  B01D69/02 ,  B01D69/10 ,  B01D71/44 ,  B01D69/12

摘要： A forward osmosis membrane characterized in that a thin membrane layer having the performance of a semi-permeable membrane is laminated on a polyketone support layer.