Liquid purification or separation – Filter – Supported – shaped or superimposed formed mediums
Patent
1997-05-13
2000-02-22
Fortuna, Ana
Liquid purification or separation
Filter
Supported, shaped or superimposed formed mediums
21050044, 21050027, 21050021, 21050038, 427245, B01D 2900
Patent
active
060269685
ABSTRACT:
A reverse osmosis composite membrane comprising at least a porous support membrane layer and a separation layer, wherein a water-insoluble polymer layer having an anionic hydrophilic group formed on the surface of the separation layer is provided. Therefore, it has high anion property, high salt rejection, high water permeability, and chlorine tolerance, and can perform practical desalination under relatively low pressure.
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A.F. Graefe, D.Wong, "Development of a Chlorine-Resistant Composite Membrane for Reverse Osmosis", (Office of Water Research and Technology, Dept. of the Interior) Report No. 2001-20, Aug. 1980.
Hachisuka Hisao
Ikeda Kenichi
Fortuna Ana
Nitto Denko Corporation
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