Title:
REVERSE OSMOSIS MEMBRANE CLEANING AGENT, CLEANING LIQUID, AND CLEANING METHOD
Document Type and Number:
WIPO Patent Application WO/2017/017994
Kind Code:
A1
Abstract:
This reverse osmosis (RO) membrane cleaning agent, which effectively removes contaminants that cannot be sufficiently removed by conventional cleaning agents when an RO membrane used to treat water, in particular an aromatic polyamide-based RO membrane, becomes contaminated, and the performance thereof in terms of the permeation flux, differential pressure, salt rejection rate, and the like is reduced, includes an aliphatic amide and/or an aromatic amide. Also provided is a method in which the cleaning agent or a cleaning liquid is used to clean a RO membrane. The aliphatic amide and/or the aromatic amide, and in particular a water-soluble aliphatic amide and/or an aromatic amide having a comparatively low molecular weight exhibit/exhibits an excellent cleaning effect with respect to contaminants adhered to an aromatic polyamide-based RO membrane.
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Inventors:
ISHII KAZUKI (JP)
KAWAKATSU TAKAHIRO (JP)
KAWAKATSU TAKAHIRO (JP)
Application Number:
PCT/JP2016/059149
Publication Date:
February 02, 2017
Filing Date:
March 23, 2016
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
B01D65/06; B01D71/56; C11D1/22; C11D3/28; C11D3/32
Domestic Patent References:
| WO2009069296A1 | 2009-06-04 |
Foreign References:
| JP2001507750A | 2001-06-12 | |||
| JP2001161811A | 2001-06-19 | |||
| JPH01503044A | 1989-10-19 | |||
| JP2013223835A | 2013-10-31 | |||
| JP2009247992A | 2009-10-29 | |||
| JP2004244345A | 2004-09-02 | |||
| JP2004082021A | 2004-03-18 | |||
| JP2015155534A | 2015-08-27 | |||
| JPH06100898A | 1994-04-12 | |||
| JPH09506661A | 1997-06-30 |
Other References:
See also references of EP 3329983A4
Attorney, Agent or Firm:
SHIGENO, Tsuyoshi et al. (JP)
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