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    • 4. 发明申请
    • COMPOSITE SEMIPERMEABLE MEMBRANE AND PRODUCTION THEREOF
    • 复合膜可制膜及其生产
    • WO1991011250A1
    • 1991-08-08
    • PCT/JP1990000095
    • 1990-01-26
    • TORAY INDUSTRIES, INC.SASAKI, TatsuoFUJIMAKI, HideoUEMURA, Tadahiro
    • TORAY INDUSTRIES, INC.
    • B01D71/62
    • B01D71/56B01D69/125Y02B10/50
    • This invention relates to a composite semipermeable membrane of low-pressure high desalination type having an excellent chlorine resistance and a method for the production thereof. This membrane is composed of a microporous supporting membrane and an ultrathin membrane covering said supporting membrane, wherein the ultrathin membrane comprises a polyamide prepared by the polycondensation of a dicarboxylic acid halide with piperazine and ethylenediamine as the main component and a molar fraction of ethylenediamine polyamide constituents to piperazine polyamide constituents is regulated to be in the range of 0.01 to 0.25, so that the membrane has a high desalination rate, a high fresh water generation rate and a sufficient chlorine durability. Thus it can be used in a small ultrapure water generator and a household water purifier and as a reverse osmosis membrane for treating waste water or the like.
    • 本发明涉及耐氯性优异的低压高脱盐型复合半透膜及其制造方法。 该膜由微孔支撑膜和覆盖所述支撑膜的超薄膜构成,其中超薄膜包括通过二羧酸卤化物与哌嗪和乙二胺作为主要成分的缩聚制备的聚酰胺和乙二胺聚酰胺成分的摩尔分数 至哌嗪聚酰胺成分调节在0.01至0.25的范围内,使得膜具有高脱盐率,高淡水产生速率和足够的氯耐久性。 因此,可以用于小型超纯水发生器和家用净水器以及用作处理废水等的反渗透膜。