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Title:
WATER TREATMENT CHEMICAL FOR MEMBRANES AND MEMBRANE TREATMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2020/071309
Kind Code:
A1
Abstract:
A water treatment chemical for membranes, which contains a polymer compound having a carboxyl group and a sulfo group, preferably a polymer compound represented by formula (1). A membrane treatment method wherein this water treatment chemical for membranes is added to membrane feed water when water to be treated, which contains an organic compound having a phenolic hydroxy group, is subjected to a membrane separation treatment. In the formula, m and n represent molar percentages of respective structural units; (m + n) is 90-100%; and R represents an anionic group containing a sulfo group.

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Inventors:
ISHII KAZUKI (JP)
Application Number:
PCT/JP2019/038493
Publication Date:
April 09, 2020
Filing Date:
September 30, 2019
Export Citation:
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Assignee:
KURITA WATER IND LTD (JP)
International Classes:
B01D65/08; B01D61/10; C02F1/44
Domestic Patent References:
WO2018168522A12018-09-20
Foreign References:
JP2016187788A2016-11-04
JP2015174030A2015-10-05
JP2015174082A2015-10-05
JP2011056496A2011-03-24
JP5867532B22016-02-24
JP2012206044A2012-10-25
JP2018190257A2018-11-29
Other References:
See also references of EP 3862071A4
Attorney, Agent or Firm:
SHIGENO, Tsuyoshi et al. (JP)
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