Title:
SCALE INHIBITING METHOD AND MAGNESIUM HYDROXIDE SCALE INHIBITOR FOR REVERSE OSMOSIS MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2014/157139
Kind Code:
A1
Abstract:
To provide: a scale inhibiting method which can minimize the formation of magnesium hydroxide scale in water treatment using a reverse osmosis membrane without a remarkable increase in the phosphorus concentration of effluent; and a magnesium hydroxide scale inhibitor for a reverse osmosis membrane. This scale inhibiting method includes: adding, to an aqueous system to be treated with a reverse osmosis membrane, a copolymer which is obtained by polymerizing a monomer component that comprises both (meth)acrylic acid and 2-(meth)acrylamido-2-methylpropane- sulfonic acid and which has a weight-average molecular weight of 1000 to 50000; and thus inhibiting the formation of magnesium hydroxide scale in the water treatment using a reverse osmosis membrane.
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Inventors:
NISHIDA IKUKO (JP)
Application Number:
PCT/JP2014/058186
Publication Date:
October 02, 2014
Filing Date:
March 25, 2014
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
C02F5/10; B01D61/02; C02F1/44; C02F5/00; C08F220/06
Domestic Patent References:
WO2012132892A1 | 2012-10-04 |
Foreign References:
JP2010202893A | 2010-09-16 | |||
JPH09290275A | 1997-11-11 | |||
JPH0360798A | 1991-03-15 |
Attorney, Agent or Firm:
WATANABE KAORU (JP)
Kaoru Watanabe (JP)
Kaoru Watanabe (JP)
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