Water-soluble polyphosphates
    13.
    发明授权
    Water-soluble polyphosphates 失效
    水溶性聚磷酸酯

    公开(公告)号:US3607018A

    公开(公告)日:1971-09-21

    申请号:US3607018D

    申请日:1968-07-02

    Applicant: ALLIED CHEM

    CPC classification number: C05B13/06 C01B25/414

    Abstract: A mixture of alkali metal chloride and a reactive excess of phosphoric acid is heated in finely divided form at a temperature of about 250 to 400* C. for a period of time of about 1 to 100 seconds. The resulting alkali metal polyphosphates are separated from byproduct hydrogen chloride and quickly cooled to a temperature of less than about 80* C. The alkali metal polyphosphates are water-soluble and free of chloride ion and alkali metal metaphosphates.

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