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    Process for making metal oxide nanoparticles
    4.
    发明申请
    Process for making metal oxide nanoparticles 失效
    制备金属氧化物纳米粒子的方法

    公开(公告)号：US20070292340A1

    公开(公告)日：2007-12-20

    申请号：US11183588

    申请日：2005-07-18

    申请人： Juergen Plischke ,  Stephan De La Veaux ,  Scott Frerichs ,  Jodi Witt ,  Christian Normand

    发明人： Juergen Plischke ,  Stephan De La Veaux ,  Scott Frerichs ,  Jodi Witt ,  Christian Normand

    IPC分类号： C01G23/047

    CPC分类号： B82Y30/00 ,  B01J19/088 ,  B01J19/26 ,  B01J2219/00119 ,  B01J2219/0886 ,  B01J2219/0894 ,  C01B13/20 ,  C01B13/28 ,  C01B13/30 ,  C01G1/02 ,  C01G23/07 ,  C01P2004/51 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/12

    摘要： There is described a process for preparing metal oxide particles which are substantially free of coarse tail from an oxidizing agent and a vaporous metal reactant in a flow reactor; comprising, (a) directing a flow of the metal reactant into a contacting region of the flow reactor; comprising (a) passing a flow of oxidizing agent through a high temperature zone of the flow reactor to form a flow of hot oxidizing agent and directing the flow of the hot oxidizing agent onto the contacting region of the flow reactor at a flow condition sufficient to form a reaction stream comprising a flow of hot oxidizing agent, a flow of metal reactant and a diffusive flow of the hot oxidizing agent and the metal reactant, the temperature of the hot oxidizing agent being at least sufficient to initiate oxidation of the metal reactant in the diffusive flow; (c) passing the reaction stream into a reaction zone of the flow reactor, while simultaneously introducing a flow of an upper cooling fluid substantially coaxially with the reaction stream to form a fluid curtain which surrounds the reaction stream; (d) maintaining the fluid curtain while the metal oxide particles form within the diffusive flow of the reaction stream and until at least a major portion of the reaction stream is cooled to a temperature below the temperature at which metal oxide particles coalesce; and (e) separating the metal oxide particles from the reaction stream.

    摘要翻译： 描述了在流动反应器中制备基本上不含氧化剂和气态金属反应物的粗尾的金属氧化物颗粒的方法; 包括：（a）将金属反应物的流动引导到流动反应器的接触区域中; 包括（a）使氧化剂流通过流动反应器的高温区以形成热氧化剂流并将热氧化剂的流引导到流动反应器的接触区上，流动条件足以 形成包含热氧化剂流，金属反应物流和热氧化剂和金属反应物的扩散流的反应流，热氧化剂的温度至少足以引发金属反应物的氧化 扩散流; （c）使反应物流进入流动反应器的反应区，同时引入与反应物流基本上同轴的上部冷却流体流，以形成围绕反应流的流体帘; （d）在金属氧化物颗粒在反应物流的扩散流中形成时保持流体幕，直到反应物流的至少大部分被冷却到低于金属氧化物颗粒聚结温度的温度; 和（e）从反应流中分离金属氧化物颗粒。

    Apparatus for making metal oxide nanopowder
    5.
    发明申请
    Apparatus for making metal oxide nanopowder 失效
    金属氧化物纳米粉末制备装置

    公开(公告)号：US20070292321A1

    公开(公告)日：2007-12-20

    申请号：US11183725

    申请日：2005-07-18

    申请人： Juergen Plischke ,  Stephan De La Veaux ,  Scott Frerichs ,  Jodi Witt ,  Christian Normand

    发明人： Juergen Plischke ,  Stephan De La Veaux ,  Scott Frerichs ,  Jodi Witt ,  Christian Normand

    IPC分类号： B01J19/26 ,  B01J19/00

    CPC分类号： B82Y30/00 ,  B01J19/088 ,  B01J19/26 ,  B01J2219/00119 ,  B01J2219/0886 ,  B01J2219/0894 ,  C01B13/20 ,  C01B13/28 ,  C01B13/30 ,  C01G1/02 ,  C01G23/07 ,  C01P2004/51 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/12 ,  Y10S977/842 ,  Y10S977/844 ,  Y10S977/846 ,  Y10S977/891

    摘要： There is described an apparatus for making metal oxide particles which are substantially free of coarse tail from an oxidizing agent and a metal reactant in a flow reactor. The apparatus can be a concentric tubular flow reactor comprising a substantially funnel-shaped reactant contacting region located adjacent to a reaction zone which is able to direct a flow of a hot oxidizing agent towards a flow of the metal reactant to form a reaction stream which flows downstream into a reaction zone, whereby the hot oxidizing agent of the reaction stream is able to surround the flow of metal reactant sufficient to prevent the metal reactant from contacting the wall of the reactant contacting region and forming scale on the wall. A cooling fluid conduit being able to direct a flow of a cooling fluid into the reaction zone to flow coaxially with the reaction stream and to form a fluid curtain between the reaction stream and a baffle, which defines at least a portion of the reaction zone, while the metal reactant and hot oxidizing agent within the reaction stream react to form the metal oxide nanopowder prevents scale from forming on the baffle.

    摘要翻译： 描述了一种用于制造在流动反应器中基本上不含氧化剂和金属反应物的粗尾的金属氧化物颗粒的装置。 该装置可以是同心的管式流动反应器，其包括位于邻近反应区的基本上漏斗形的反应物接触区域，其能够引导热氧化剂流向金属反应物的流动以形成流动的反应物流 下游进入反应区，由此反应物流的热氧化剂能够围绕金属反应物的流动，足以防止金属反应物与反应物接触区域的壁接触并在壁上形成垢。 冷却流体导管能够将冷却流体的流动引导到反应区域中以与反应流同轴地流动并且在反应流和限定反应区域的至少一部分的挡板之间形成流体窗口， 而反应流中的金属反应物和热氧化剂反应形成金属氧化物纳米粉末，防止在挡板上形成垢。