Water treatment chemical for membranes and membrane treatment method
AssigneeKurita Water Industries Ltd.
InventorKazuki Ishii
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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.
Claims4
A water treatment chemical for membranes, wherein the water treatment chemical contains a polymer compound having a carboxyl group and a sulfo group,
- the polymer compound is a polymer compound has a mass-average molecular weight of 8000 to 15000 represented by the following Formula (1),
- in Formula (1), m and n represent molar % of each structural unit, m+n=90 to 100%, n is 10 to 40%, and R is —C(═O)—NH—C(CH3)2—CH2SO3H and/or —CH2OCH2—CH(—OH)—CH2SO3H.
Dependencies are inferred from the claim text.