Title:
REMOVAL DEVICE OF FINE PARTICLES IN WATER AND ULTRAPURE WATER PRODUCTION/SUPPLY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2016/136650
Kind Code:
A1
Abstract:
In a subsystem and water supply path before a use point in an ultrapure water production/supply process, fine particles having a particle diameter of at most 50 nm-in particular, extremely fine particles having a particle diameter of at most 10 nm-are highly removed from the water. A removal device of fine particles in water according to the present invention comprises a membrane filtration means comprising a microfiltration membrane or an ultrafiltration membrane having a weak cationic functional group. As the microfiltration membrane or the ultrafiltration membrane having a weak cationic functional group, it 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.
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Inventors:
KAWAKATSU TAKAHIRO (JP)
IINO HIDEAKI (JP)
FUKUI TAKEO (JP)
KANEDA MASAYUKI (JP)
SATO DAISUKE (JP)
IINO HIDEAKI (JP)
FUKUI TAKEO (JP)
KANEDA MASAYUKI (JP)
SATO DAISUKE (JP)
Application Number:
PCT/JP2016/054999
Publication Date:
September 01, 2016
Filing Date:
February 22, 2016
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
ASAHI CHEMICAL IND (JP)
ASAHI CHEMICAL IND (JP)
International Classes:
C02F1/44; B01D61/14; B01D61/58; B01D71/72; B01J41/04; B01J47/12; C08J5/22; C08J9/36
Foreign References:
| JPH09141262A | 1997-06-03 | |||
| JP2014173013A | 2014-09-22 | |||
| JPH09206743A | 1997-08-12 | |||
| JP2005246126A | 2005-09-15 | |||
| JPH10216721A | 1998-08-18 |
Attorney, Agent or Firm:
SHIGENO, Tsuyoshi et al. (JP)
Takeshi Shigeno (JP)
Takeshi Shigeno (JP)
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