VERFAHREN ZUR HERSTELLUNG VON N,N-DIMETHYLACETAMID (DMAC)
    6.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON N,N-DIMETHYLACETAMID (DMAC) 有权
    VERFAHREN ZUR HERSTELLUNG VON N,N-二甲基乙酰胺(DMAC)

    公开(公告)号:EP1828102A1

    公开(公告)日:2007-09-05

    申请号:EP05815808.0

    申请日:2005-12-03

    IPC分类号: C07C231/02 C07C233/05

    CPC分类号: C07C231/02 C07C233/05

    摘要: A process for preparing N,N-dimethylacetamide (DMAC) by continuously reacting methyl acetate (MeOAc) with dimethylamine (DMA) in the presence of a basic catalyst, wherein MeOAc is used in the form of a methanolic solution which is obtained as a by-product in the preparation of polyTHF by transesterifying polyTHF diacetate with methanol.

    摘要翻译: 一种通过在碱性催化剂存在下使乙酸甲酯(MeOAc)与二甲胺(DMA)连续反应制备N,N-二甲基乙酰胺(DMAC)的方法,其中MeOAc以甲醇溶液形式使用,其作为 - 通过使聚THF二乙酸酯与甲醇进行酯交换来制备聚THF。

    KATALYSATOR UND VERFAHREN ZUR HERSTELLUNG VON POLYTETRAHYDROFURAN
    10.
    发明公开
    KATALYSATOR UND VERFAHREN ZUR HERSTELLUNG VON POLYTETRAHYDROFURAN 审中-公开
    催化剂及其制造方法聚四氢呋喃

    公开(公告)号:EP1047720A1

    公开(公告)日:2000-11-02

    申请号:EP98962437.4

    申请日:1998-12-10

    IPC分类号: C08G65/20

    CPC分类号: C08G65/2657 C08G65/20

    摘要: The invention relates to a method for producing polytetrahydrofuran and polytetrahydrofuran copolymers, diesters or monoesters thereof by polymerising tetrahydrofuran in the presence of at least one telogen and/or comonomer on acid- activated montmorillonite catalysts, whereby the ratio of the montmorillonite structure to the sum of the muscovite and kaolin structure in the montmorillonite catalyst, which is determined from the intensities of the reflexes measured at 5.5° 2È for montmorillonite, 9.0° 2È for muscovite and 12,5° 2È for kaolin is, after acid activation, at least 5:1.