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27 条记录 (耗时 0.014 秒)

    Processes for preparing mono-dispersed particles
    22.
    发明授权
    Processes for preparing mono-dispersed particles 失效
    制备单分散颗粒的方法

    公开(公告)号：US4925704A

    公开(公告)日：1990-05-15

    申请号：US206863

    申请日：1988-06-13

    申请人： Goro Sato ,  Michio Komatsu ,  Hiroyasu Nishida ,  Yoshichika Tanaka ,  Tsuguo Koyanagi ,  Kei Mihara

    发明人： Goro Sato ,  Michio Komatsu ,  Hiroyasu Nishida ,  Yoshichika Tanaka ,  Tsuguo Koyanagi ,  Kei Mihara

    IPC分类号： C01B13/32 ,  C01B33/16 ,  C01G23/053 ,  C01G25/02 ,  G02F1/1339

    CPC分类号： C01B33/163 ,  C01B13/32 ,  C01G23/053 ,  C01G25/02 ,  G02F1/13392 ,  C01P2004/03 ,  C01P2004/32 ,  C01P2004/52 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/22 ,  C01P2006/60 ,  Y10T428/2998

    摘要： In a process for preparing spherical particles of a metal oxide or hydroxide having a particle size of from 0.1 to 10 .mu.m by adding a corresponding metal alkoxide to a dispersion of water-alcohol system having dispersed therein a metal oxide or hydroxide as a seed, under alkaline conditions and allowing a decomposition product from said metal alkoxide to attach onto said seed to effect particle growth of the seed, the improvement which comprises maintaining said dispersion at a substantially constant pH within the range between 10 and 13 during the addition of the metal alkoxide to said dispersion and the subsequent particle growth of the seed, thereby to prepare mono-dispersed particles substantially free from particle aggregation having a sharp particle size distribution of a standard deviation of not greater than 0.5. The white particles so prepared may be, after separation, heat treated to provide black particles. The white or black particles may be coated with a synthetic resin in the surface. The products are useful particularly as spacers for liquid crystal display devices.

    摘要翻译： 在通过向其中分散有金属氧化物或氢氧化物作为种子的水 - 醇体系的分散体中加入相应的金属醇盐来制备粒径为0.1至10μm的金属氧化物或氢氧化物的球形颗粒的方法中， 在碱性条件下并允许来自所述金属醇盐的分解产物附着在所述种子上以实现种子的颗粒生长，其改进包括在添加金属期间将所述分散体保持在10至13之间的基本恒定的pH值在10和13之间的范围内 所述分散体和随后的种子颗粒生长，从而制备基本上不具有标准偏差不大于0.5的尖锐粒度分布的颗粒聚集的单分散颗粒。 如此制备的白色颗粒可以在分离后进行热处理以提供黑色颗粒。 白色或黑色颗粒可以在表面上涂覆合成树脂。 该产品特别用作液晶显示装置的间隔物。

    Catalytic composition for oxychlorination
    24.
    发明授权
    Catalytic composition for oxychlorination 有权
    氧氯化催化组合物

    公开(公告)号：US07595276B2

    公开(公告)日：2009-09-29

    申请号：US12219823

    申请日：2008-07-29

    申请人： Takashi Kodama ,  Tsuguo Koyanagi

    发明人： Takashi Kodama ,  Tsuguo Koyanagi

    IPC分类号： B01J21/00 ,  C07C17/15 ,  B01J23/00 ,  B01J20/00 ,  B01J21/04 ,  B01J23/02

    CPC分类号： B01J23/72 ,  B01J21/12 ,  B01J23/83 ,  B01J35/023 ,  B01J35/1019 ,  B01J37/0045 ,  C07C17/156 ,  C07C19/045

    摘要： The present invention provides a catalytic composition for oxychlorination excellent in the fluidity, the capability of suppressing lowering of the fluidity, and the attrition resistance as well as in the selectivity for EDC and the capability of suppressing combustion of ethylene.The catalytic composition for oxychlorination contains silica alumina particles in the range from 5 to 40 wt % when expressed as an oxide thereof, copper in the range from 5 to 20 wt % when expressed as an oxide thereof (CuO), and alumina as a carrier in the range from 40 to 90 wt % when expressed as that of Al2O3. The silica alumina particles are prepared by coating silica particles with alumina, and have the average particle diameter in the range from 3 to 100 nm. A content of alumina in the silica alumina particles is in the range from 0.1 to 10 wt %.

    摘要翻译： 本发明提供了流动性优异的流动性，抑制流动性降低的能力和耐磨耗性以及EDC的选择性和抑制乙烯燃烧的能力的氧氯化催化组合物。 用于氧氯化的催化组合物含有氧化硅氧化铝颗粒，当其氧化物表示为5至40重量％时，铜以氧化物（CuO）表示时为5至20重量％，氧化铝为载体 当表示为Al 2 O 3时，其范围为40至90重量％。 二氧化硅氧化铝颗粒通过用氧化铝涂覆二氧化硅颗粒制备，并且其平均粒径在3至100nm的范围内。 二氧化硅氧化铝颗粒中的氧化铝含量为0.1〜10重量％。