SCALE PREVENTING AGENT FOR REVERSE OSMOSIS MEMBRANE AND SCALE PREVENTING METHOD
Provided are a scale preventing agent for reverse osmosis membranes and a scale preventing method that can prevent attachment of calcium phosphate scale arising in reverse osmosis membrane processing without increasing the phosphorus concentration in discharged water and which does not give rise to...
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Format | Patent |
Language | English French Japanese |
Published |
04.10.2012
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Abstract | Provided are a scale preventing agent for reverse osmosis membranes and a scale preventing method that can prevent attachment of calcium phosphate scale arising in reverse osmosis membrane processing without increasing the phosphorus concentration in discharged water and which does not give rise to fine sludge such as gelated materials. To a reverse osmosis membrane processing system is added a scale preventing agent having a unit derived from a (meth)acrylate and a structural unit derived from 2-(meth)acrylamide-2-methylpropanesulfonic acid. The unit derived from 2-(meth)acrylamide-2-methylpropanesulfonic acid is 10 - 40 mol%, and the main component of the scale preventing agent is a water-soluble copolymer having a mass average molecular weight of 1 × 104 - 5 × 104.
Cette invention concerne un agent antitartre pour membranes d'osmose inverse et un procédé pour prévenir la formation de tartre qui peut empêcher l'attachement de tartre de type phosphate de calcium survenant dans le traitement par membrane d'osmose inverse sans augmenter la concentration de phosphore dans l'eau déchargée et qui n'entraîne pas la formation d'une fine boue telle que des matériaux gélatinisés. Selon l'invention, un agent antitartre ayant un motif dérivé d'un (méth)acrylate et un motif structural dérivé d'un acide 2-(méth)acrylamide-2-méthylpropane-sulfonique est ajouté à un système de traitement par membrane d'osmose inverse. Le motif dérivé de l'acide 2-(méth)acrylamide-2-méthylpropane-sulfonique représente 10 à 40 % en mol, et le composant principal de l'agent antitartre est un copolymère hydrosoluble ayant un poids moléculaire moyen en poids de 1 à 5 × 104. |
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AbstractList | Provided are a scale preventing agent for reverse osmosis membranes and a scale preventing method that can prevent attachment of calcium phosphate scale arising in reverse osmosis membrane processing without increasing the phosphorus concentration in discharged water and which does not give rise to fine sludge such as gelated materials. To a reverse osmosis membrane processing system is added a scale preventing agent having a unit derived from a (meth)acrylate and a structural unit derived from 2-(meth)acrylamide-2-methylpropanesulfonic acid. The unit derived from 2-(meth)acrylamide-2-methylpropanesulfonic acid is 10 - 40 mol%, and the main component of the scale preventing agent is a water-soluble copolymer having a mass average molecular weight of 1 × 104 - 5 × 104.
Cette invention concerne un agent antitartre pour membranes d'osmose inverse et un procédé pour prévenir la formation de tartre qui peut empêcher l'attachement de tartre de type phosphate de calcium survenant dans le traitement par membrane d'osmose inverse sans augmenter la concentration de phosphore dans l'eau déchargée et qui n'entraîne pas la formation d'une fine boue telle que des matériaux gélatinisés. Selon l'invention, un agent antitartre ayant un motif dérivé d'un (méth)acrylate et un motif structural dérivé d'un acide 2-(méth)acrylamide-2-méthylpropane-sulfonique est ajouté à un système de traitement par membrane d'osmose inverse. Le motif dérivé de l'acide 2-(méth)acrylamide-2-méthylpropane-sulfonique représente 10 à 40 % en mol, et le composant principal de l'agent antitartre est un copolymère hydrosoluble ayant un poids moléculaire moyen en poids de 1 à 5 × 104. |
Author | NISHIDA IKUKO KOWATA KENJI |
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DocumentTitleAlternate | AGENT ANTITARTRE POUR MEMBRANE D'OSMOSE INVERSE ET PROCÉDÉ POUR PRÉVENIR LA FORMATION DE TARTRE |
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RelatedCompanies | NISHIDA IKUKO KURITA WATER INDUSTRIES LTD KOWATA KENJI |
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Snippet | Provided are a scale preventing agent for reverse osmosis membranes and a scale preventing method that can prevent attachment of calcium phosphate scale... |
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SubjectTerms | CHEMISTRY METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE |
Title | SCALE PREVENTING AGENT FOR REVERSE OSMOSIS MEMBRANE AND SCALE PREVENTING METHOD |
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