14.
    发明专利
    未知

    公开(公告)号:DE102005012482A1

    公开(公告)日:2006-09-21

    申请号:DE102005012482

    申请日:2005-03-16

    Applicant: BASF AG

    Abstract: A process for the preparation of polyoxymethylenes by cationic polymerization of the monomers a) in the presence of initiators b) and, if appropriate, in the presence of regulators c) and subsequent deactivation and isolation of the polymer, wherein the total amount of proton donors is less than 5000 ppm in the entire polymerization.

    15.
    发明专利
    未知

    公开(公告)号:DE102004027022A1

    公开(公告)日:2006-01-05

    申请号:DE102004027022

    申请日:2004-06-02

    Applicant: BASF AG

    Abstract: In a process for distillatively removing ammonia and water from mixtures obtained in the preparation of polyamides which comprise a lactam and/or diamines, and, if appropriate, an aminonitrile and/or dinitrile, and also a cyclopentanone impurity in two stages: 1) the mixture is distilled at from 11 to 35 bar to give, as the top product T1, water, ammonia and cyclopentanone, and, as the bottoms B1, water, the lactam and/or diamines, and, if appropriate, the aminonitrile and/or dinitrile, and 2) T1 is distilled at from 11 to 35 bar to give, as the top product T2, ammonia and cyclopentanone, and, as the bottoms B2, water.

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