PROCESS FOR PREPARING SELECTIVE DENITRIFYING ANION EXCHANGER

    公开(公告)号:CZ278954B6

    公开(公告)日:1994-10-19

    申请号:CS410590

    申请日:1990-08-22

    Applicant: MICHEK VACLAV

    Abstract: The process is based on the separated recycling of two parts of an anion exchanger in the original chloride form. The first part is partially recycled by a solution containing sulphur ions, preferably in a concentration less than 0.5 mol/l. The second part is partially recycled by a solution containing hydrogen carbonate ions, preferably in a concentration less than 0.5 mol/l. Both parts are mixed together in such a ratio that the resulting representation of the functional groups in the mixture is 50 to 98 % sulphuric forms, 2 to 50 % chloride forms and 2 to 50 % hydrogen carbonate forms.

    100.
    发明专利
    未知

    公开(公告)号:DE58900532D1

    公开(公告)日:1992-01-16

    申请号:DE58900532

    申请日:1989-07-01

    Applicant: BAYER AG

    Abstract: The invention relates to a novel process for preparing bifunctional anion exchange resins by partial quaternisation of weakly basic anion exchangers containing tertiary amino groups by means of conventional alkylating agents; the process is characterised in that the weakly basic anion exchangers are partially loaded with strong acids before the quaternisation. The invention also relates to the bifunctional anion exchanger resins obtainable by this process and to their use for the desalination and decolorisation of glucose solutions.

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