发明名称 |
METHOD FOR IMPROVING REJECTION RATE OF REVERSE OSMOSIS MEMBRANE, REJECTION RATE IMPROVING AGENT, AND REVERSE OSMOSIS MEMBRANE |
摘要 |
To provide a method for improving a rejection rate of an RO membrane, which further improves the stability of removal performance (rejection rate) and flux stability (sustainability of contamination resistance). In a method for improving a rejection rate of an RO membrane, including a step of allowing an aqueous solution containing a polyphenol to pass through an RO membrane, the method further includes a step of allowing an aqueous solution containing at least one type selected from the group consisting of a modified poly(vinyl alcohol), a high molecular polysaccharide, and a poly(amino acid) to pass through the RO membrane. The method preferably further includes a step of allowing an aqueous solution containing an organic compound having an amino group and having a molecular weight of 1,000 or less to pass through the RO membrane. |
申请公布号 |
US2015306545(A1) |
申请公布日期 |
2015.10.29 |
申请号 |
US201314649790 |
申请日期 |
2013.12.18 |
申请人 |
KURITA WATER INDUSTRIES LTD. |
发明人 |
HAYAKAWA Kunihiro;KAWAKATSU Takahiro |
分类号 |
B01D67/00;C08K5/20;C08K5/31;C08K5/134;C02F1/44;C09D129/04 |
主分类号 |
B01D67/00 |
代理机构 |
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代理人 |
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主权项 |
1. A method for improving a rejection rate of a reverse osmosis membrane, the method comprising a step of allowing an aqueous solution containing a polyphenol to pass through a reverse osmosis membrane, wherein the method further comprises a step of allowing an aqueous solution containing at least one type selected from the group consisting of a modified poly(vinyl alcohol), a high molecular polysaccharide, and a poly(amino acid) to pass through the reverse osmosis membrane. |
地址 |
Nakano-ku, Tokyo JP |