发明名称 |
PROCESS FOR PRODUCING A DRIED COMPOSITE SEMIPERMEABLE MEMBRANE |
摘要 |
The present invention aims at providing a process for producing a dried composite semipermeable membrane having extremely small amount of content of unreacted components, outstanding water permeability and salt-blocking rate even after drying treatment, and outstanding contamination resistance and durability. The present invention relates to a process for producing a dried composite semipermeable membrane comprising the steps of: preparing a composite semipermeable membrane having a skin layer including a polyamide resin obtained by reaction between a polyfunctional amine component and a polyfunctional acid halide component formed on the surface of a porous support; preparing a washed composite semipermeable membrane by washing the composite semipermeable membrane; preparing a treated composite semipermeable membrane by contact of a moisturing solution including a moisturizer and a hydrophilization agent only to the surface of the porous support of the washed composite semipermeable membrane and by contact of a protecting solution only to the surface of the skin layer of the washed composite semipermeable membrane; and drying the treated composite semipermeable membrane.
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申请公布号 |
US2008251447(A1) |
申请公布日期 |
2008.10.16 |
申请号 |
US20070869568 |
申请日期 |
2007.10.09 |
申请人 |
KOUMOTO ATSUHITO;KAMADA TAKASHI;OHARA TOMOMI |
发明人 |
KOUMOTO ATSUHITO;KAMADA TAKASHI;OHARA TOMOMI |
分类号 |
B01D69/12;B01D71/56;B29C67/20 |
主分类号 |
B01D69/12 |
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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