Process for the synthesis of 2,5-dihydroxyterephthalic acid
    13.
    发明授权
    Process for the synthesis of 2,5-dihydroxyterephthalic acid 失效
    2,5-二羟基对苯二甲酸合成方法

    公开(公告)号:US07777072B2

    公开(公告)日:2010-08-17

    申请号:US12041960

    申请日:2008-03-04

    申请人: Joachim C. Ritter

    发明人: Joachim C. Ritter

    IPC分类号: C07C63/00

    摘要: 2,5-dihydroxyterephthalic acid is produced in high yields and high purity from 2,5-dihaloterephthalic acid by contact with a copper source and a ligand that coordinates to copper under basic conditions.

    摘要翻译: 通过与铜源和在碱性条件下与铜配位的配体接触,从2,5-二卤对苯二甲酸以高产率和高纯度生产2,5-二羟基对苯二甲酸。

    PROCESS FOR THE SYNTHESIS OF ETHERS OF AROMATIC ACIDS
    14.
    发明申请
    PROCESS FOR THE SYNTHESIS OF ETHERS OF AROMATIC ACIDS 失效
    合成芳香酸的方法

    公开(公告)号:US20100016540A1

    公开(公告)日:2010-01-21

    申请号:US12518201

    申请日:2007-12-18

    申请人: Joachim C. Ritter

    发明人: Joachim C. Ritter

    IPC分类号: C08G73/06 C07C41/01

    CPC分类号: C07C51/367 C07C65/21

    摘要: Ethers of aromatic acids are produced from halogenated aromatic acids in a reaction mixture containing a copper (I) or copper (II) source and a diketone ligand that coordinates to copper.

    摘要翻译: 芳族酸的醚由含有铜(I)或铜(II)源和与铜配位的二酮配体的反应混合物中的卤代芳族酸生成。

    Process for the synthesis of 2,5-dihydroxyterephthalic acid
    17.
    发明授权
    Process for the synthesis of 2,5-dihydroxyterephthalic acid 失效
    2,5-二羟基对苯二甲酸合成方法

    公开(公告)号:US07339076B1

    公开(公告)日:2008-03-04

    申请号:US11604937

    申请日:2006-11-28

    申请人: Joachim C. Ritter

    发明人: Joachim C. Ritter

    IPC分类号: C07C63/00

    摘要: 2,5-dihydroxyterephthalic acid is produced in high yields and high purity from 2,5-dihaloterephthalic acid by contact with a copper source and a ligand that coordinates to copper under basic conditions.

    摘要翻译: 通过与铜源和在碱性条件下与铜配位的配体接触,从2,5-二卤对苯二甲酸以高产率和高纯度生产2,5-二羟基对苯二甲酸。

    Process for the preparation of monomers for polybenzimidazole materials
    20.
    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。