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1. (WO2018146310) A METHOD FOR PRODUCING ULTRAPURE WATER

Pub. No.:    WO/2018/146310    International Application No.:    PCT/EP2018/053442
Publication Date: Fri Aug 17 01:59:59 CEST 2018 International Filing Date: Tue Feb 13 00:59:59 CET 2018
IPC: C02F 1/42
B01J 47/04
B01J 47/127
C02F 1/28
C02F 1/44
C02F 1/469
C02F 103/04
Applicants: MERCK PATENT GMBH
Inventors: KANO, Ichiro
DIMA, Gabriela
GROSS, Julien
RATIEUVILLE, Yann
Title: A METHOD FOR PRODUCING ULTRAPURE WATER
Abstract:
The present invention relates to a method for producing purified water comprising a step (a) of passing water through a mixed bed ion exchanger comprising beads having a diameter between 0.2 and 0.7 mm and a step (b) of passing water through a fibrous ion-exchange material. The invention further relates to a module comprising the mixed bed ion exchange resin and the fibrous material and to a water treatment system for producing ultrapure water comprising the mixed bed ion exchange resin and the fibrous material.