ULTRAPURE WATER PRODUCTION SYSTEM AND ULTRAPURE WATER PRODUCTION METHOD

WIPO Patent Application WO/2019/188964

A1

The purpose of the present invention is to provide an ultrapure water production system and an ultrapure water production method capable of shortening a startup period after sterilization of the ultrapure water production system. Provided is an ultrapure water production system 1 that includes an ultrafiltration membrane device 2 and a fine particle filter 3 which are connected in series, and that produces ultrapure water by treating treatment-water with the ultrafiltration membrane device 2 and the fine particle filter 3, in that order, wherein: the ultrafiltration device 2 has a removal rate of 99.8% or more of fine particles having a particle diameter of 20 nm or more; and the fine particle filter 3 is equipped with an oxidizing agent resistant filter membrane. Also provided is an ultrapure water production method.

WO/2015/166569	WATER PURIFIER
WO/2009/078412	SPIRAL TYPE FILM FILTERING DEVICE AND MOUNTING MEMBER, AND FILM FILTERING DEVICE MANAGING SYSTEM AND FILM FILTERING DEVICE MANAGING METHOD USING THE SAME
WO/2010/069641	WATER PROCESSING PLANT AND A METHOD AND COMPUTER PROGRAM FOR OPERATING A WATER PROCESSING PLANT

TANJI AKIRA (JP)
NAGATA SHIORI (JP)
NOGUCHI YUKIO (JP)

PCT/JP2019/012461

October 03, 2019

March 25, 2019

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NOMURA MICRO SCIENCE KK (JP)

C02F1/44; B01D61/18; B01D61/58; B01D69/02; B01D71/34; B01D71/36; B01D71/68; C02F1/32; C02F1/42; C02F1/58; C02F1/70; C02F9/02; C02F9/04; C02F9/12

WO2015050125A1

2015-04-09

US5518624A	1996-05-21
JPH1157417A	1999-03-02
JPH0760291A	1995-03-07

SAKURA PATENT OFFICE, p.c. (JP)

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