INTEGRATED PROCESS FOR THE PREPARATION OF POLYBENZIMIDAZOLE PRECURSORS
    1.
    发明申请
    INTEGRATED PROCESS FOR THE PREPARATION OF POLYBENZIMIDAZOLE PRECURSORS 失效
    用于制备聚苯并咪唑前体的一体化方法

    公开(公告)号:US20100160679A1

    公开(公告)日:2010-06-24

    申请号:US12634757

    申请日:2009-12-10

    IPC分类号: C07C51/42

    CPC分类号: C07C63/28 Y02P20/125

    摘要: Processes are provided for preparing complexes of 2,3,5,6-tetraaminotoluene with an aromatic diacid where the aromatic diacid is insoluble in water under ambient conditions. An integrated process design starting with nitration of 2,6-dihalotoluene eliminates costly intermediate drying and recrystallization steps. Handling of solid materials with possible skin sensitizing properties and toxicity is avoided, thereby eliminating human and environmental exposure.

    摘要翻译: 提供了制备2,3,5,6-四氨基甲苯与芳族二酸的络合物的方法,其中芳族二酸在环境条件下不溶于水。 从2,6-二卤代甲苯硝化开始的综合工艺设计消除了昂贵的中间干燥和重结晶步骤。 避免了具有可能的皮肤敏感性和毒性的固体材料的处理,从而消除了人体和环境的暴露。