5.
    发明专利
    未知

    公开(公告)号:DK132682A

    公开(公告)日:1982-09-26

    申请号:DK132682

    申请日:1982-03-24

    Applicant: BASF AG

    Abstract: A process for coloring paper with an acid dye and/or direct dye in an aqueous medium in the presence of a water-soluble reaction product of an alkylating agent, possessing an aromatic substituent, with a cationic polyelectrolyte. The process gives papers with high color strength and substantially avoids cylinder twosidedness of the coloration.

    10.
    发明专利
    未知

    公开(公告)号:DK132582A

    公开(公告)日:1982-09-26

    申请号:DK132582

    申请日:1982-03-24

    Applicant: BASF AG

    Abstract: A process for removing anionic compounds from water which is recycled in manufacturing processes, and from waste water, by adding (1) water-soluble products obtained by reacting an alkylating agent, having an aromatic substituent, with a cationic polyelectrolyte and (2) mineral adsorbents and/or a magnesium salt, aluminum salt or iron salt, with formation and flocculation of water-insoluble reaction products.

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