INTEGRATED PROCESSES FOR THE PREPARATION OF POLYBENZIMIDAZOLE PRECURSORS
    1.
    发明申请
    INTEGRATED PROCESSES FOR THE PREPARATION OF POLYBENZIMIDAZOLE PRECURSORS 审中-公开
    用于制备聚苯并咪唑前体的综合方法

    公开(公告)号:US20130172621A1

    公开(公告)日:2013-07-04

    申请号:US13517272

    申请日:2010-12-21

    IPC分类号: C07C213/02

    摘要: An integrated process is provided for efficiently preparing 2,4,5-triaminophenol, starting with nitration of 2,6-dihalobenzene; high purity salts thereof; and complexes of 2,4,5-triaminophenol aromatic diacids, which are precursors for making polybenzimidazole polymer for high performance fibers. The process design eliminates several costly intermediate drying and recrystallization steps. The handling of solid materials with possible skin sensitizing properties and toxicity is avoided, thereby eliminating human and environmental exposure.

    摘要翻译: 提供了一种综合方法,用于有效地制备2,4,5-三氨基苯酚,从2,6-二卤代苯的硝化开始; 其高纯度盐; 以及2,4,5-三氨基苯酚芳族二酸的络合物,其是用于制备用于高性能纤维的聚苯并咪唑聚合物的前体。 该工艺设计消除了几个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。

    Process for the synthesis of 1,3-diamino-4,6-dinitrobenzene
    2.
    发明授权
    Process for the synthesis of 1,3-diamino-4,6-dinitrobenzene 失效
    合成1,3-二氨基-4,6-二硝基苯的方法

    公开(公告)号:US08071812B1

    公开(公告)日:2011-12-06

    申请号:US12335997

    申请日:2008-12-16

    IPC分类号: C07C209/00

    CPC分类号: C07C209/10 C07C211/52

    摘要: A process is provided for the preparation of 1,3-diamino-4,6-dinitrobenzene by amination of 1,3-dihalo-4,6-dinitrobenzene. The presence of water advantageously results in a highly pure product, free or essentially free of glycol ether impurities.

    摘要翻译: 提供了通过1,3-二卤代-4,6-二硝基苯胺化制备1,3-二氨基-4,6-二硝基苯的方法。 水的存在有利地产生游离或基本上不含二醇醚杂质的高纯度产物。

    PROCESS FOR THE SYNTHESIS OF 1-AMINO-3-HALO-4,6-DINITROBENZENE
    4.
    发明申请
    PROCESS FOR THE SYNTHESIS OF 1-AMINO-3-HALO-4,6-DINITROBENZENE 审中-公开
    1-氨基-3-羟基-4,6-二氮杂萘的合成方法

    公开(公告)号:US20130158296A1

    公开(公告)日:2013-06-20

    申请号:US13517052

    申请日:2010-12-21

    IPC分类号: C07C209/10

    CPC分类号: C07C209/10 C07C211/52

    摘要: A process is provided for the preparation of 1-amino-3-halo-4,6-dinitrobenzene and related compounds by monoamination of dihalodinitrobenzenes by ammonia in the presence of solvent and water. Using glycol as a solvent for the dihalodinitrobenzene and feeding ammonia at a rate at which it is consumed allows for the synthesis of high purity product, such as 1-amino-3-chloro-4,6-dinitrobenzene, at high yields.

    摘要翻译: 提供了一种通过在溶剂和水存在下用氨将二卤代硝基苯单胺化制备1-氨基-3-卤代-4,6-二硝基苯及相关化合物的方法。 使用乙二醇作为二卤代硝基苯的溶剂并以其消耗的速率供给氨,可高产率地合成高纯度产物如1-氨基-3-氯-4,6-二硝基苯。

    Process for the preparation of monomers for polybenzimidazole materials
    5.
    发明授权
    Process for the preparation of monomers for polybenzimidazole materials 失效
    制备聚苯并咪唑物质单体的方法

    公开(公告)号:US08431747B2

    公开(公告)日:2013-04-30

    申请号:US12634730

    申请日:2009-12-10

    IPC分类号: C07C209/38

    摘要: A process is provided to produce 2,3,5,6-tetraaminotoluene. Highly pure salts of 2,3,5,6-tetraaminotoluene are produced via reduction of 2,6-diamino-3,5-dinitrotoluene. The 2,3,5,6-tetraaminotoluene salt is precipitated as a clean (>99% purity) product. The salt is a precursor for monomers to make a polybenzimidazole for high performance fibers.

    摘要翻译: 提供了一种制备2,3,5,6-四氨基甲苯的方法。 通过还原2,6-二氨基-3,5-二硝基甲苯制备2,3,5,6-四氨基甲苯的高纯度盐。 2,3,5,6-四氨基甲苯盐作为清洁(> 99%纯度)产物沉淀。 该盐是用于制备用于高性能纤维的聚苯并咪唑的单体的前体。

    PROCESS FOR THE SYNTHESIS OF 2,6-DIAMINO-3,5-DINITROTOLUENE
    8.
    发明申请
    PROCESS FOR THE SYNTHESIS OF 2,6-DIAMINO-3,5-DINITROTOLUENE 失效
    2,6-二氨基-3,5-哌啶酮的合成方法

    公开(公告)号:US20100160678A1

    公开(公告)日:2010-06-24

    申请号:US12634767

    申请日:2009-12-10

    IPC分类号: C07C63/26 C07C209/10

    摘要: An improved process is provided for the preparation of 2,6-diamino-3,5-dinitrotoluene by amination of 2,6-dichloro-3,5-dinitrotoluene. The presence of water unexpectedly results in a highly pure product, free of glycol ether impurities. This product can be used to make highly pure 2,3,5,6-tetraaminotoluene, which in turn can be used to make high molecular weight polybenzimidazoles for high strength fibers.

    摘要翻译: 提供了通过2,6-二氯-3,5-二硝基甲苯的胺化制备2,6-二氨基-3,5-二硝基甲苯的改进方法。 水的存在意外地导致高纯度的产品,不含二醇醚杂质。 该产品可用于制备高纯度的2,3,5,6-四氨基甲苯,其又可用于制备用于高强度纤维的高分子量聚苯并咪唑。

    Integrated process for the preparation of polybenzimidazole precursors
    10.
    发明授权
    Integrated process for the preparation of polybenzimidazole precursors 失效
    用于制备聚苯并咪唑前体的综合方法

    公开(公告)号:US08188316B2

    公开(公告)日:2012-05-29

    申请号:US12634757

    申请日:2009-12-10

    IPC分类号: C07C211/00

    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。