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    Process for the production of a high purity terephthalic acid
    1.
    发明授权
    Process for the production of a high purity terephthalic acid 失效
    生产高纯度对苯二甲酸的方法

    公开(公告)号：US4230882A

    公开(公告)日：1980-10-28

    申请号：US907773

    申请日：1978-05-19

    申请人： Maomi Seko ,  Tetsuya Miyake ,  Hiroshi Takeuchi ,  Masatoshi Tanouchi

    发明人： Maomi Seko ,  Tetsuya Miyake ,  Hiroshi Takeuchi ,  Masatoshi Tanouchi

    IPC分类号： C07C51/265 ,  C07C51/33

    CPC分类号： C07C51/265

    摘要： An improved process for the production of a high purity terephthalic acid by a liquid phase oxidation reaction of para-xylene by means of molecular oxygen or a molecular oxygen-containing gas in an aliphatic monocarboxylic acid solvent in the presence of a cobalt-manganese-bromine catalyst system, characterized in that as the cobalt-manganese-bromine catalyst system there is used a catalyst system of a specific composition at a specific concentration, and the liquid phase oxidation reaction is effected in the presence of acetaldehyde in addition to the cobalt-manganese-bromine catalyst system under relatively mild temperature (170.degree.-190.degree. C.) and pressure conditions while maintaining the water concentration in the reaction system at a specified low level. The terephthalic acid produced according to the process of the present invention is of so high a quality that it can be used for the direct production of a polyalkylene terephthalate from the acid and an alkylene glycol or ethylene oxide, which direct production does not need the preparation of an intermediate such as a methyl ester of terephthalic acid.

    摘要翻译： 在钴 - 溴 - 溴存在下，通过分子氧或分子氧气体在脂族一元羧酸溶剂中通过对二甲苯的液相氧化反应制备高纯度对苯二甲酸的改进方法 催化剂体系，其特征在于，作为钴 - 锰 - 溴催化剂体系，使用特定浓度的特定组成的催化剂体系，并且在乙醛存在下进行液相氧化反应，除了钴 - 锰 在170℃〜190℃的温度和压力条件下，将反应体系中的水浓度保持在规定的低水平。 根据本发明方法生产的对苯二甲酸具有如此高的质量，其可用于从酸和亚烷基二醇或环氧乙烷直接生产聚对苯二甲酸亚烷基酯，其直接生产不需要制备 的中间体如对苯二甲酸的甲酯。

    Multi-cell electrolyzer
    9.
    发明授权
    Multi-cell electrolyzer 失效
    多池电解槽

    公开(公告)号：US4643818A

    公开(公告)日：1987-02-17

    申请号：US760897

    申请日：1985-07-31

    申请人： Maomi Seko ,  Reiji Takemura ,  Hideharu Miyamori

    发明人： Maomi Seko ,  Reiji Takemura ,  Hideharu Miyamori

    IPC分类号： C25B9/00 ,  C25B9/04 ,  C25B9/20 ,  C25B15/08

    CPC分类号： C25B9/206 ,  C25B9/04 ,  C25B9/045

    摘要： A multi-cell electrolyzer comprising a plurality of unit cells, each of which is composed of an anode chamber containing an anode and a cathode chamber containing a cathode and a cation exchange membrane for partitioning said unit cell into said anode chamber and said cathode chamber, and each of which is adapted to have an internal pressure maintained at a level higher than the atmospheric pressure in operation of the electrolyzer, said plurality of unit cells being arranged in series and adapted to be energized through a plurality of current lead plates, and rigid multi-contact electrically conductive means provided between the adjacent unit cells and/or between each current lead plate and the unit cell adjacent thereto, thereby establishing electrical connection between the adjacent unit cells and/or between each current lead plate and the unit cell adjacent thereto. With such a structure, not only is the electrical contact resistance between the adjacent unit cells and between each current lead plate and the unit cell adjacent thereto extremely reduced but also the current density in the unit cells is rendered uniform. Further, the present multi-cell electrolyzer can be easily constructed either in a bipolar form or in a monopolar form using unit cells common to both of the bipolar and monopolar forms.

    摘要翻译： 一种多单元电解槽，包括多个单元电池，每个单元电池由包含阳极的阳极室和含有阴极的阳极室和用于将所述单电池分隔成所述阳极室和所述阴极室的阳离子交换膜组成， 并且其中的每一个适于在电解槽的操作中将内部压力维持在高于大气压力的水平面上，所述多个单元电池串联布置并适于通过多个电流引线板通电，并且刚性 设置在相邻单元电池之间和/或每个电流引线板和与其相邻的单元电池之间的多触点导电装置，从而在相邻单元电池之间和/或每个电流引线板与与其相邻的单元电池之间建立电连接 。 通过这样的结构，不仅相邻单位电池之间和每个电流引线板与与其相邻的单位电池之间的电接触电阻极大地降低，而且单元电池中的电流密度也是均匀的。 此外，本发明的多单元电解器可以容易地以双极形式或单极形式使用双极和单极形式共同的单元电池。