利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

5 条记录 (耗时 0.017 秒)

    Method of regenerating a degraded working solution for the production of hydrogen peroxide
    2.
    发明授权
    Method of regenerating a degraded working solution for the production of hydrogen peroxide 失效
    再生用于生产过氧化氢的降解工作溶液的方法

    公开(公告)号：US3965251A

    公开(公告)日：1976-06-22

    申请号：US384846

    申请日：1973-08-02

    申请人： Hiroshi Shin ,  Junichiro Sugano ,  Tadashi Yoshii ,  Kichiro Iwamoto ,  Yasuhisa Kuriyama ,  Minoru Kakuda

    发明人： Hiroshi Shin ,  Junichiro Sugano ,  Tadashi Yoshii ,  Kichiro Iwamoto ,  Yasuhisa Kuriyama ,  Minoru Kakuda

    IPC分类号： C01B15/023 ,  C01B15/02

    CPC分类号： C01B15/023

    摘要： A working solution comprising anthraquinone and its derivatives, used for the production of hydrogen peroxide on becoming degraded by formation of non-effective anthraquinone is generated by an auto-oxidation process employing anthraquinone, which comprises:Contacting, at a temperature of below 130.degree.C., and in the presence of a catalyst comprising a metal selected from a platinum group and supported on a carrier, said degraded working solution, which comprises non-effective anthraquinone and tetrahydroanthraquinone with an olefinic compound whose hydrogenation product is gaseous at said contact temperature andSubsequently, contacting the thus treated working solution, at a temperature above 130.degree.C., and in the presence of a catalyst comprising a metal selected from the platinum group and supported on a carrier, with an olefinic compound whose hydrogenation product is gaseous at said contact temperature,Said method being characterized by the fact that at a temperature below 130.degree.C., the regeneration of non-effective anthraquinone is accelerated much faster than the dehydrogenation reaction of tetrahydroquinone and therefore, at a pont in time, when all non-effective anthraquinone has been converted to anthraquinone, the temperature can be raised above 130.degree.C. to permit dehydrogenation of said tetrahydroanthraquinone without incurring any impedance of the dehydrogenation reaction.

    摘要翻译： 通过使用蒽醌的自动氧化法，产生用于通过形成非有效蒽醌而降解过氧化氢的蒽醌及其衍生物的工作溶液，其包括：

    Process for preparing polyphenylene oxides
    4.
    发明授权
    Process for preparing polyphenylene oxides 失效
    制备聚苯醚的方法

    公开(公告)号：US4067851A

    公开(公告)日：1978-01-10

    申请号：US639141

    申请日：1975-12-09

    申请人： Tetsuo Tomita ,  Tadashi Yoshii ,  Akira Ito

    发明人： Tetsuo Tomita ,  Tadashi Yoshii ,  Akira Ito

    IPC分类号： C08G65/44

    CPC分类号： C08G65/44

    摘要： Polyphenylene oxides, self-condensation products of phenols, are prepared with a high yield through oxidative coupling by employing a catalyst system with higher activity, which comprises a copper compound, iodine or an iodine-containing compound and a primary amine.

    摘要翻译： 通过使用包含铜化合物，碘或含碘化合物和伯胺的具有较高活性的催化剂体系通过氧化偶合以高产率制备聚苯醚，酚的自缩合产物。

    Process for producing polyphenylene oxides
    5.
    发明授权
    Process for producing polyphenylene oxides 失效
    生产聚苯醚的方法

    公开(公告)号：US3989671A

    公开(公告)日：1976-11-02

    申请号：US445042

    申请日：1974-02-22

    申请人： Eiichi Yonemitsu ,  Akitoshi Sugio ,  Tetsuo Tomita ,  Tadashi Yoshii ,  Akira Ito

    发明人： Eiichi Yonemitsu ,  Akitoshi Sugio ,  Tetsuo Tomita ,  Tadashi Yoshii ,  Akira Ito

    IPC分类号： C08G65/44

    CPC分类号： C08G65/44

    摘要： Polyphenylene oxides, self-condensation products of phenols, are produced through oxidative coupling by employing a novel catalyst system which comprises a copper compound, an iodine compound and tertiary diamine which is capable of forming a stable chelate ring with the copper compound.According to this invention, copper compounds, which hitherto have been considered to be unsuitable for using with tertiary amines, act with excellent performance as a component of the catalyst.

    摘要翻译： 聚苯醚，酚类的自缩合产物是通过使用能够与铜化合物形成稳定的螯合环的铜化合物，碘化合物和叔二胺的新型催化剂体系，通过氧化偶联制得的。