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    Formation of metal oxide nanowire networks (nanowebs) of low-melting metals
    3.
    发明授权
    Formation of metal oxide nanowire networks (nanowebs) of low-melting metals 失效
    形成低熔点金属的金属氧化物纳米线网络（nanowebs）

    公开(公告)号：US07445671B2

    公开(公告)日：2008-11-04

    申请号：US10869489

    申请日：2004-06-16

    申请人： Mahendra Kumar Sunkara ,  Shashank Sharma ,  Burtron H. Davis ,  Uschi M. Graham

    发明人： Mahendra Kumar Sunkara ,  Shashank Sharma ,  Burtron H. Davis ,  Uschi M. Graham

    IPC分类号： C30B21/02

    CPC分类号： C30B29/16 ,  B82Y30/00 ,  C30B11/06 ,  C30B29/60

    摘要： A method of producing networks of low melting metal oxides such as crystalline gallium oxide comprised of one-dimensional nanostructures. Because of the unique arrangement of wires, these crystalline networks defined as “nanowebs”, “nanowire networks”, and/or “two-dimensional nanowires”. Nanowebs contain wire densities on the order of 109/cm2. A possible mechanism for the fast self-assembly of crystalline metal oxide nanowires involves multiple nucleation and coalescence via oxidation-reduction reactions at the molecular level. The preferential growth of nanowires parallel to the substrate enables them to coalesce into regular polygonal networks. The individual segments of the polygonal network consist of both nanowires and nanotubules of β-gallium oxide. The synthesis of highly crystalline noncatalytic low melting metals such as β-gallium oxide tubes, nanowires, and nanopaintbrushes is accomplished using molten gallium and microwave plasma containing a mixture of monoatomic oxygen and hydrogen. Gallium oxide nanowires were 20-100 nm thick and tens to hundreds of microns long. Transmission electron microscopy (TEM) revealed the nanowires to be highly crystalline and devoid of any structural defects. Results showed that multiple nucleation and growth of gallium oxide nanostructures can occur directly out of molten gallium exposed to appropriate composition of hydrogen and oxygen in the gas phase. The method of producing nanowebs is extendible to other low melting metals and their oxides such as for example: zinc oxide, tin oxide, aluminum oxide, bismuth oxide, and titanium dioxide.

    摘要翻译： 一种生产由一维纳米结构构成的低熔点金属氧化物如结晶镓氧化物的网络的方法。 由于电线的独特布置，这些晶体网络被定义为“纳米线”，“纳米线网络”和/或“二维纳米线”。 纳米线含有10 9 / cm 2以上的线密度。 结晶金属氧化物纳米线的快速自组装的可能机制涉及通过在分子水平上的氧化 - 还原反应的多个成核和聚结。 平行于衬底的纳米线的优先生长使它们能够聚结成规则的多边形网络。 多边形网络的各个部分由β氧化镓的纳米线和纳米管构成。 使用含有单原子氧和氢的混合物的熔融镓和微波等离子体来实现高结晶非催化低熔点金属如β-氧化镓管，纳米线和纳米管的合成。 氧化镓纳米线的厚度为20-100nm，数十至数百微米。 透射电子显微镜（TEM）显示纳米线是高度结晶的，没有任何结构缺陷。 结果表明，氧化镓纳米结构的多次成核和生长可以直接从暴露于气相中氢和氧的合适组成的熔融镓中发生。 制造纳米线的方法可以扩展到其它低熔点金属及其氧化物，例如氧化锌，氧化锡，氧化铝，氧化铋和二氧化钛。

    Bubble column apparatus for separating wax from catalyst slurry
    7.
    发明授权
    Bubble column apparatus for separating wax from catalyst slurry 失效
    用于从催化剂浆料中分离蜡的气泡柱装置

    公开(公告)号：US06762209B1

    公开(公告)日：2004-07-13

    申请号：US10233743

    申请日：2002-09-03

    申请人： James K. Neathery ,  Burtron H. Davis

    发明人： James K. Neathery ,  Burtron H. Davis

    IPC分类号： C07C2700

    CPC分类号： C10G2/33 ,  C10G2/342

    摘要： Novel methods and devices for production of liquid hydrocarbon products from gaseous reactants are disclosed. In one aspect, a method for separating a liquid hydrocarbon, typically a wax, from a catalyst containing slurry is provided, comprising passing the slurry through at least one downcomer extending from an overhead separation chamber and discharging into the bottom of a slurry bubble column reactor. The downcomer includes a cross-flow filtration element for separating a substantially particle-free liquid hydrocarbon for downstream processing. In another aspect, a method for promoting plug-flow movement in a recirculating slurry bubble column reactor is provided, comprising discharging the recirculating slurry into the reactor through at least one downcomer which terminates near the bottom of the reactor. Devices for accomplishing the above methods are also provided.

    摘要翻译： 公开了用于从气态反应物生产液态烃产物的新方法和装置。 在一个方面，提供了一种用于从含催化剂的浆料中分离液体烃（通常为蜡）的方法，包括使浆料通过从塔顶分离室延伸的至少一个降液管并排放到浆液鼓泡塔反应器的底部 。 降液管包括用于分离用于下游处理的基本上无颗粒的液态烃的交叉流过滤元件。 在另一方面，提供了一种用于促进再循环浆液鼓泡塔反应器中的活塞流动的方法，包括通过在反应器底部附近终止的至少一个降液管将再循环浆料排放到反应器中。 还提供了用于实现上述方法的装置。