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    • 6. 发明授权
    • Composite semipermeable membrane, processfor producing the same, and method of purifying water with the same
    • 复合半透膜,其制造方法,以及与其相同的水的净化方法
    • US06406626B1
    • 2002-06-18
    • US09623986
    • 2000-09-12
    • Mutsuo MurakamiYasushi TateishiYoshinari Fusaoka
    • Mutsuo MurakamiYasushi TateishiYoshinari Fusaoka
    • B01D7156
    • B01D69/125B01D69/00B01D69/02B01D71/56C02F1/441
    • The present invention relates to a composite semipermeable membrane which is characterized in that it is a composite semipermeable membrane in which there is formed by polycondensation on top of a microporous support membrane a crosslinked polyamide ultra-thin membrane layer from polyfunctional amine, polyfunctional acid halide and polyfunctional acid anhydride halide, and the flow of water permeate at an operating pressure of 0.3 MPa, a temperature of 25° C. and a pH of 6.5 lies in the range from 0.8 to 4.0 m3/m2.day and, furthermore, the percentage humic acid removal is at least 98%; a method for the production thereof; and a water purification method employing same. With the composite semipermeable membrane obtained by means of the present invention it is possible, in particular, to recover drinking water at a high rate by permitting passage of silica and preventing deposition thereof at the membrane surface while selectively separating/removing the pollutants and trace quantities of harmful materials and their precursors, etc, contained in the raw water in water treatment plants.
    • 复合半透膜技术领域本发明涉及一种复合半透膜,其特征在于,是复合半透膜,其中通过多孔载体膜顶部缩聚形成多层官能胺的交联聚酰胺超薄膜层,多官能酰卤和 多官能酸酐卤化物,并且在0.3MPa的操作压力,25℃的温度和6.5的pH下渗透水的流量在0.8〜4.0m 3 / m 2·天的范围内,此外, 腐殖酸去除率至少为98%; 一种生产它的方法; 和使用其的水净化方法。 通过本发明得到的复合半透膜,特别是通过允许二氧化硅通过并防止其在膜表面的沉积而以高速率回收饮用水,同时选择性地分离/除去污染物和痕量 水处理厂原水中含有的有害物质及其前体等。