Title:
SILICA CONTAMINATION INHIBITION METHOD AND SILICA CONTAMINATION INHIBITOR FOR REVERSE OSMOSIS MEMBRANE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/112819
Kind Code:
A1
Abstract:
This silica contamination inhibition method for a reverse osmosis membrane system is characterized by causing an acrylic acid-based polymer and/or a maleic acid-based polymer, and a bound chlorine-based oxidizer and/or a bound bromine-based oxidizer to exist in a water to be treated. This silica contamination inhibitor for a reverse osmosis membrane system contains: a copolymer of acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid and/or a terpolymer of acrylic acid, acrylamide methylpropanesulfonic acid, and N-substituted acrylamide; and a bound chlorine-based oxidizer and/or a bound bromine-based oxidizer.
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Inventors:
OHTSUKA YUTA (JP)
TAKAHASHI JUNICHI (JP)
HAYAKAWA KUNIHIRO (JP)
TAKAHASHI JUNICHI (JP)
HAYAKAWA KUNIHIRO (JP)
Application Number:
PCT/JP2022/045255
Publication Date:
June 22, 2023
Filing Date:
December 08, 2022
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
B01D61/04; B01D65/08; C02F5/00; C02F5/10; C02F5/12
Domestic Patent References:
| WO2008090854A1 | 2008-07-31 |
Foreign References:
| JP2016187788A | 2016-11-04 | |||
| JP2017025046A | 2017-02-02 | |||
| JP2010058079A | 2010-03-18 |
Attorney, Agent or Firm:
SHIGENO, Tsuyoshi et al. (JP)
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