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    Vapor phase flame process for making ceramic particles using a corona discharge electric field
    1.
    发明授权
    Vapor phase flame process for making ceramic particles using a corona discharge electric field 失效
    使用电晕放电电场制造陶瓷颗粒的气相火焰法

    公开(公告)号：US5861132A

    公开(公告)日：1999-01-19

    申请号：US923656

    申请日：1997-09-04

    申请人： Sotiris Emmanuel Pratsinis ,  Srinivas Vemury ,  George P. Fotou ,  Andreas Gutsch

    发明人： Sotiris Emmanuel Pratsinis ,  Srinivas Vemury ,  George P. Fotou ,  Andreas Gutsch

    IPC分类号： B01J21/06 ,  B01J35/02 ,  C01B13/28 ,  C01B21/06 ,  C01B33/18 ,  C01G19/02 ,  C01G23/07 ,  C01G23/047 ,  C01B21/00 ,  C01B31/30 ,  C01B33/12

    CPC分类号： C01B21/06 ,  C01B13/28 ,  C01B33/183 ,  C01G19/02 ,  C01G23/07 ,  C01P2002/54 ,  C01P2004/82 ,  C01P2006/12

    摘要： A gas phase process for the production of titanium dioxide powders having well-controlled crystalline and surface area characteristics is disclosed. In this process, which is preferably carried out in a laminar diffusion flame reactor, vapor phase TiCl.sub.4 and oxygen are mixed in a reaction area which is heated externally. The titanium dioxide powder formed is then collected. It is preferred that the heat source used be a hydrocarbon fueled (e.g., methane) flame. Optionally, a vapor phase dopant (such as SiCl.sub.4) may be added to the reaction mixture to desirably affect the physical properties of the titanium dioxide produced. In a particularly preferred embodiment, a corona electric field is positioned across the area where the combustion reaction takes place (i.e., the reaction area). High anatase, high surface area titanium dioxide powders made by this process are excellent photocatalysts. The products of this process and the use of those products as photocatalysts are also disclosed. This process is also useful for producing other ceramic powders (such as silicon dioxide and tin oxide), as well as pure metallic or alloy powders.

    摘要翻译： 公开了一种用于生产具有良好控制的结晶和表面积特性的二氧化钛粉末的气相方法。 在该方法中，其优选在层状扩散火焰反应器中进行，气相TiCl 4和氧气在外部加热的反应区域中混合。 然后收集形成的二氧化钛粉末。 优选地，所使用的热源是烃燃料（例如甲烷）火焰。 任选地，可将气相掺杂剂（例如SiCl 4）加入到反应混合物中以期望影响所生产的二氧化钛的物理性能。 在特别优选的实施例中，电晕电场位于燃烧反应发生的区域（即反应区域）上。 高锐钛型，通过该方法制备的高表面积二氧化钛粉末是优异的光催化剂。 还公开了该方法的产物和这些产物作为光催化剂的用途。 该方法对于生产其它陶瓷粉末（例如二氧化硅和氧化锡）以及纯金属或合金粉末也是有用的。

    Process for producing ceramic powders, especially titanium dioxide useful as a photocatalyst
    2.
    发明授权
    Process for producing ceramic powders, especially titanium dioxide useful as a photocatalyst 失效
    制造陶瓷粉末的方法，特别是可用作光催化剂的二氧化钛

    公开(公告)号：US5698177A

    公开(公告)日：1997-12-16

    申请号：US488694

    申请日：1995-06-08

    申请人： Sotiris Emmanuel Pratsinis ,  Srinivas Vemury ,  George P. Fotou ,  Andreas Gutsch

    发明人： Sotiris Emmanuel Pratsinis ,  Srinivas Vemury ,  George P. Fotou ,  Andreas Gutsch

    IPC分类号： B01J21/06 ,  B01J35/02 ,  C01B13/28 ,  C01B21/06 ,  C01B33/18 ,  C01G19/02 ,  C01G23/07 ,  C01G23/047

    CPC分类号： C01B21/06 ,  C01B13/28 ,  C01B33/183 ,  C01G19/02 ,  C01G23/07 ,  C01P2002/54 ,  C01P2004/82 ,  C01P2006/12

    摘要： A gas phase process for the production of titanium dioxide powders having well-controlled crystalline and surface area characteristics is disclosed. In this process, which is preferably carried out in a laminar diffusion flame reactor, vapor phase TiCl.sub.4 and oxygen are mixed in a reaction area which is heated externally. The titanium dioxide powder formed is then collected. It is preferred that the heat source used be a hydrocarbon fueled (e.g., methane) flame. Optionally, a vapor phase dopant (such as SiCl.sub.4) may be added to the reaction mixture to desirably affect the physical properties of the titanium dioxide produced. In a particularly preferred embodiment, a corona electric field is positioned across the area where the combustion reaction takes place (i.e., the reaction area). High anatase, high surface area titanium dioxide powders made by this process are excellent photocatalysts. The products of this process and the use of those products as photocatalysts are also disclosed. This process is also useful for producing other ceramic powders (such as silicon dioxide and tin oxide), as well as pure metallic or alloy powders.

    摘要翻译： 公开了一种用于生产具有良好控制的结晶和表面积特性的二氧化钛粉末的气相方法。 在该方法中，其优选在层状扩散火焰反应器中进行，气相TiCl 4和氧气在外部加热的反应区域中混合。 然后收集形成的二氧化钛粉末。 优选地，所使用的热源是烃燃料（例如甲烷）火焰。 任选地，可将气相掺杂剂（例如SiCl 4）加入到反应混合物中以期望影响所生产的二氧化钛的物理性能。 在特别优选的实施例中，电晕电场位于燃烧反应发生的区域（即反应区域）上。 高锐钛型，通过该方法制备的高表面积二氧化钛粉末是优异的光催化剂。 还公开了该方法的产物和这些产物作为光催化剂的用途。 该方法对于生产其它陶瓷粉末（例如二氧化硅和氧化锡）以及纯金属或合金粉末也是有用的。

    Catalytic converter
    6.
    发明授权
    Catalytic converter 有权
    催化转化器

    公开(公告)号：US06667012B1

    公开(公告)日：2003-12-23

    申请号：US09534935

    申请日：2000-03-24

    申请人： Joginder N. Anand ,  George P. Fotou ,  Cheng-Hung Hung ,  Joseph D. Smith

    发明人： Joginder N. Anand ,  George P. Fotou ,  Cheng-Hung Hung ,  Joseph D. Smith

    IPC分类号： B01D5394

    CPC分类号： B01D53/945 ,  B01J21/04 ,  B01J37/0215 ,  Y02T10/22

    摘要： The present invention provides a catalytic converter for treating internal combustion engine exhaust comprising a substrate, fumed metal oxide aggregates adhered to the substrate, wherein no non-fumed metal oxide is present in the intra-aggregate voids, and at least one catalyst adhered to the fumed metal oxide aggregates. The present invention also provides a method of preparing such a catalytic converter, as well as a method of treating the exhaust of an internal combustion engine comprising contacting the exhaust of an internal combustion engine with a catalytic converter of the present invention.

    摘要翻译： 本发明提供了一种用于处理内燃机排气的催化转化器，其包括基材，附着在基材上的热解金属氧化物聚集体，其中在集料内空隙内不存在非热解金属氧化物，以及至少一种催化剂 热解金属氧化物聚集体。 本发明还提供了一种制备这种催化转化器的方法，以及一种处理内燃机的排气的方法，包括使内燃机的排气与本发明的催化转化器接触。

    Process for the production of fumed silica
    7.
    发明授权
    Process for the production of fumed silica 有权
    生产热解法二氧化硅的方法

    公开(公告)号：US07910081B2

    公开(公告)日：2011-03-22

    申请号：US11740134

    申请日：2007-04-25

    申请人： Joanne Liu ,  Yakov E. Kutsovsky ,  George P. Fotou

    发明人： Joanne Liu ,  Yakov E. Kutsovsky ,  George P. Fotou

    IPC分类号： C01B33/12

    CPC分类号： C01B33/183

    摘要： The invention provides a process for the production of fumed silica. The process comprises providing a silicon halide feedstock comprising about 80% to 100% methyltrichlorosilane, combining the silicon halide feedstock with hydrogen gas and oxygen gas to form a reactant mixture, discharging the reactant mixture out of a burner, and combusting the hydrogen gas and the oxygen gas of the reactant mixture so as to hydrolyze the silicon halide feedstock to produce fumed silica. Hydrogen (H2) is present in a mole fraction of about 0.11 or less based on the reactant mixture, and/or the velocity of the reactant mixture upon exiting the burner is about 25 m/s or more.

    摘要翻译： 本发明提供一种生产热解二氧化硅的方法。 该方法包括提供包含约80％至100％甲基三氯硅烷的卤化硅原料，将卤化硅原料与氢气和氧气组合以形成反应物混合物，将反应物混合物排出燃烧器，并将氢气和 氧化反应混合物的氧气，以便将卤化硅原料水解以产生热解二氧化硅。 基于反应物混合物，氢（H 2）以约0.11或更低的摩尔分数存在，和/或离开燃烧器时反应物混合物的速度为约25m / s或更高。