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    Dispersion liquid of silica particles and production method therefor
    6.
    发明授权
    Dispersion liquid of silica particles and production method therefor 有权

    公开(公告)号：US11427730B2

    公开(公告)日：2022-08-30

    申请号：US16764050

    申请日：2018-11-15

    申请人： JGC CATALYSTS AND CHEMICALS LTD.

    发明人： Miki Egami ,  Mitsuaki Kumazawa ,  Hirotada Arakane ,  Ryo Muraguchi ,  Toshiharu Hirai

    IPC分类号： C09G1/02 ,  C09K3/14 ,  C01B33/18

    摘要： Provided is a dispersion liquid of silica particles, comprising silica particles having an average particle diameter of 5 to 300 nm determined from an electron micrograph and a density of 1.20 g/cm3 or more determined from a specific surface area determined by a BET method using nitrogen adsorption, wherein the dispersion liquid has a pH of less than 8, a silica concentration of 12 to 40% by mass, and a viscosity in terms of a silica concentration of 20% by mass of 40 mPa·s or less. When this silica particle is used as an abrasive, it is possible to realize a sufficient polishing speed and a smooth polished surface on which occurrence of scratches is suppressed.

    Ceria-based composite fine particle dispersion, production method therefor, and polishing abrasive grain dispersion including ceria-based composite fine particle dispersion
    8.
    发明授权
    Ceria-based composite fine particle dispersion, production method therefor, and polishing abrasive grain dispersion including ceria-based composite fine particle dispersion 有权

    公开(公告)号：US11267715B2

    公开(公告)日：2022-03-08

    申请号：US16616010

    申请日：2018-05-23

    申请人： JGC Catalysts and Chemicals Ltd.

    发明人： Michio Komatsu ,  Hiroyasu Nishida ,  Yuji Tawarazako ,  Shinya Usuda ,  Kazuhiro Nakayama

    IPC分类号： C01B33/12 ,  C09K3/14 ,  H01L21/304

    摘要： Aiming at providing a ceria-based composite particle dispersion capable of polishing silica film, Si wafer or even hard-to-process material at high polishing rate, and can give high surface accuracy, disclosed is a ceria-based composite particle dispersion that contains a ceria-based composite particle that has an average particle size of 50 to 350 nm, to solve the aforementioned problem, featured by that the ceria-based composite particle has a mother particle, a cerium-containing silica layer, a child particle, and an easily soluble silica-containing layer; the mother particle contains amorphous silica as a major ingredient; the child particle contains crystalline ceria as a major ingredient; ratio of the mass of the easily soluble silica-containing layer relative to the mass of the ceria-based composite particle falls in a specific range; mass ratio of silica and ceria in the ceria-based composite particle falls in a specific range; the ceria-based composite particle, when analyzed by X-ray diffractometry, shows only a crystal phase of ceria; and the ceria-based composite particle has an average crystallite size of the crystalline ceria, when analyzed by X-ray diffractometry, of 10 to 25 nm.

    METHODS OF PRODUCING HYDROCRACKING CATALYST
    9.
    发明申请
    METHODS OF PRODUCING HYDROCRACKING CATALYST 有权

    公开(公告)号：US20220008908A1

    公开(公告)日：2022-01-13

    申请号：US16923346

    申请日：2020-07-08

    申请人： Saudi Arabian Oil Company ,  JGC Catalysts and Chemicals Ltd. ,  Japan Cooperation Center Petroleum

    发明人： Omer Refa Koseoglu ,  Robert Peter Hodgkins ,  Mitsunori Watabe ,  Koji Uchida

    IPC分类号： B01J37/30 ,  B01J6/00 ,  B01J37/00 ,  C10G47/12 ,  B01J29/08

    摘要： A method for producing a hydrocracking catalyst includes preparing a framework substituted Y-type zeolite, preparing a binder, co-mulling the framework substituted Y-type zeolite, the binder, and one or more hydrogenative metal components to form a catalyst precursor, and calcining the catalyst precursor to generate the hydrocracking catalyst. The framework substituted Y-type zeolite is prepared by calcining a Y-type zeolite at 500° C. to 700° C. to form a calcined Y-type zeolite. Further, the framework substituted Y-type zeolite is prepared by forming a suspension containing the calcined Y-type zeolite, the suspension having a liquid to solid mass ratio of 5 to 15, adding acid to adjust the pH of the suspension to less than 2.0, adding and mixing one or more of a zirconium compound, a hafnium compound, or a titanium compound to the suspension, and neutralizing the pH of the suspension to obtain the framework substituted Y-type zeolite.