发明名称 |
ZUSAMMENGESETZTE UMKEHROSMOSEMEMBRAN UND VERFAHREN ZU IHRER HERSTELLUNG |
摘要 |
<p>A composite reverse osmosis membrane is described, which includes a polyamide skin layer on a porous support, with a contact angle between the polyamide skin layer surface and water of 45 DEG or less. The composite reverse osmosis membrane has a high salt rejection and also a high water permeability. This composite reverse osmosis membrane is produced by forming a polyamide skin layer on a porous support having the steps of: forming a layer on the porous support by coating a solution A including one or more compounds having at least two reactive amino groups; contacting the layer with a solution B comprising one or more polyfunctional acid halide compounds; and subsequently, contacting the layer with a solution C comprising the polyfunctional acid halide compound of a higher concentration than the solution C. The concentration of the polyfunctional acid halide compound in the solution C is preferably at least 1.2 times of the solution B.</p> |
申请公布号 |
DE69814891(T2) |
申请公布日期 |
2004.05.13 |
申请号 |
DE1998614891T |
申请日期 |
1998.06.29 |
申请人 |
NITTO DENKO CORP., IBARAKI |
发明人 |
HIROSE, MASAHIKO;ITO, HIROKI;OHARA, TOMOMI |
分类号 |
B01D69/02;B01D69/12;B01D71/56;B32B27/34;(IPC1-7):B01D71/56;B32B5/18 |
主分类号 |
B01D69/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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