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    Flocculant for water treatment
    1.
    发明公开
    Flocculant for water treatment 失效
    Flockungsmittelfürdie Wasserbehandlung。

    公开(公告)号：EP0340353A1

    公开(公告)日：1989-11-08

    申请号：EP88304010.7

    申请日：1988-05-04

    申请人： SUIDO KIKO KABUSHIKI KAISHA

    发明人： Hasegawa, Takao ,  Onitsuka, Takuya ,  Suzuki, Minoru ,  Ehara, Yasuhiro ,  Hashimoto, Katsuhiro

    IPC分类号： C02F1/52

    CPC分类号： C02F1/5236

    摘要： Polysilicic acid having a limiting viscosity not less than twice that of monosilicic acid and a water-soluble salt of a metal capable of forming a hydroxide in water are added to the water to be treated. The polysilicic acid can be prepared by polymerizing water glass. Where the flocculant is prepared in the form aqueous solution before adding to the water to be treated, the flocculant is preferably maintained at a pH not less than 2 or not lower than 11. The gel time of the polysilicic acid may be prolonged by addition of a substance able to generate ferric ion in the solution. Thus the flocculant can maintain high aggregation ability after being stored for a long time. The silicic acid solution may be polymerized before being added with such a ferric ion generating substance.

    摘要翻译： 将具有不小于单硅酸的两倍的特性粘度的聚硅酸和能够在水中形成氢氧化物的金属的水溶性盐添加到待处理的水中。 聚硅酸可以通过聚合水玻璃来制备。 在添加到待处理水中之前以水溶液形式制备絮凝剂的情况下，优选将絮凝剂保持在不低于2或不低于11的pH。通过加入聚硅酸可以延长聚硅酸的凝胶时间 能够在溶液中产生铁离子的物质。 因此，长期存放后，絮凝剂能保持较高的聚集能力。 在加入这样的铁离子生成物质之前，硅酸溶液可以聚合。

    Flocculant for water treament and method for producing it
    2.
    发明公开
    Flocculant for water treament and method for producing it 失效
    FlockungsmittelfürWasseraufbereitung und Verfahrenfürseine Herstellung。

    公开(公告)号：EP0479218A1

    公开(公告)日：1992-04-08

    申请号：EP91116722.9

    申请日：1991-09-30

    申请人： SUIDO KIKO KABUSHIKI KAISHA

    发明人： Hasegawa, Takao ,  Onitsuka, Takuya ,  Ehara, Yasuhiro ,  Hashimoto, Katsuhiro ,  Akazawa, Hiroshi

    IPC分类号： C02F1/52 ,  C01B33/141

    CPC分类号： C02F1/5236 ,  C01B33/141

    摘要： A flocculant for water treatment containing a highly polymerized silicic acid solution having a high concentration of Si0 2 and an extremely low concentration of alkali metal substance, and a method for producing such flocculant. The silicic acid solution is prepared by dealkalimetalization of an aqueous solution of an alkali metal silicate such as water glass and re-liquefaction of the solution after once gelling. The flocculant may further contain a water soluble metal salt such as ferric chloride or ferric nitrate.

    摘要翻译： 一种用于水处理的絮凝剂，其含有高浓度SiO 2和极低浓度碱金属物质的高度聚合的硅酸溶液，以及这种絮凝剂的制备方法。 硅酸溶液是通过碱金属硅酸盐水溶液如水玻璃的碱金属化制成的，并且在一次凝胶化后再次液化溶液。 絮凝剂还可以含有水溶性金属盐，如氯化铁或硝酸铁。