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    Method and apparatus for producing nanoparticles at a high rate
    3.
    发明授权
    Method and apparatus for producing nanoparticles at a high rate 失效
    高速生产纳米粒子的方法和装置

    公开(公告)号：US5958329A

    公开(公告)日：1999-09-28

    申请号：US965469

    申请日：1997-11-06

    Applicant: Donald Lee Brown

    Inventor： Donald Lee Brown

    IPC: B01J3/00 ,  B01J12/02 ,  B01J19/08 ,  B22F9/12 ,  C01B13/20 ,  C01G9/02 ,  C01G23/047 ,  B22F9/14

    CPC classification number: B82Y30/00 ,  B01J12/02 ,  B01J19/085 ,  B01J3/006 ,  B22F9/12 ,  C01B13/20 ,  C01G23/047 ,  C01G9/02 ,  B22F2998/00 ,  B22F2999/00 ,  C01P2004/64 ,  Y10S977/777

    Abstract: A method and apparatus for producing nanoparticles at a high rate is provided. The system uses two chambers separated by a narrow duct. Contained within the lower chamber is the source material, preferably heated with an electron gun and fed with a continuous feeder for extended nanoparticle production runs. The upper chamber is used to nucleate the nanoparticles, the nanoparticles formed when the source vapor collides with a gas contained within the upper chamber. Depending upon the desired nanoparticles, the gas within the upper chamber is either inert or reactive. The duct connecting the upper and lower chambers is narrow enough to allow differential pumping of the chambers. Furthermore the vapor stream flowing though the duct at high speed provides a pumping action which helps to maintain the differential pressures within the two chambers. At least a portion of the top surface of the upper chamber is cooled, thus providing a condensation site for the nanoparticles. Periodically one or more scrappers remove the condensed nanoparticles from the condensation surface, allowing them to collect within particle collection containers surrounding the duct.

    Abstract translation: 提供了一种高速生产纳米粒子的方法和装置。 该系统使用由狭窄的管道隔开的两个室。 包含在下腔室内的是源材料，优选用电子枪加热，并且用连续进料器供给以延长纳米粒子生产运行。 上室用于使纳米颗粒成核，当源蒸气与包含在上室内的气体碰撞时形成纳米颗粒。 取决于所需的纳米颗粒，上部室内的气体是惰性或反应性的。 连接上部和下部腔室的管道足够窄以允许腔室的差动泵送。 此外，高速流过管道的蒸汽流提供了有助于保持两个室内的压差的泵送作用。 上室的顶表面的至少一部分被冷却，从而提供纳米颗粒的冷凝位置。 定期地，一个或多个刮板从冷凝表面去除凝结的纳米颗粒，使其能够收集在围绕管道的颗粒收集容器内。

    Combustion flame synthesis of nanophase materials
    4.
    发明授权
    Combustion flame synthesis of nanophase materials 失效
    燃烧火焰合成纳米相材料

    公开(公告)号：US5876683A

    公开(公告)日：1999-03-02

    申请号：US552191

    申请日：1995-11-02

    Applicant: Nicholas Glumac ,  Bernard H. Kear ,  Ganesh Skandan ,  Yijia Chen

    Inventor： Nicholas Glumac ,  Bernard H. Kear ,  Ganesh Skandan ,  Yijia Chen

    IPC: C01B13/20 ,  C01B31/06 ,  C01B33/18 ,  C23C16/27 ,  C23C16/40 ,  C23C16/453

    CPC classification number: B82Y30/00 ,  C01B13/20 ,  C01B31/06 ,  C01B33/18 ,  C23C16/275 ,  C23C16/402 ,  C23C16/453 ,  C01P2004/64 ,  C01P2006/60

    Abstract: A low pressure combustion flame method for the production of nanophase powders, coatings and free-standing forms. The process involves controlled thermal decomposition of one or more metalorganic precursors in a flat-flame combustor unit in which both temperature distribution and gas phase residence time are uniform over the entire surface of the burner. It is this feature that makes the combustion flame reactor such a versatile tool for (1) high rate production of loosely agglomerated nanoparticle powders with controlled particle size and distribution, (2) uniform deposition of shape conformal nanophase coatings, and (3) net-shaped fabrication of nanocrystalline free-standing forms such as sheets, rings and drums. Applications for this new nanomaterials processing technology include electrical, thermal, optical, display, magnetic, catalytic, tribological and structural materials.

    Abstract translation: 用于生产纳米相粉末，涂层和独立形式的低压燃烧火焰法。 该方法涉及在燃烧器的整个表面上的温度分布和气相停留时间均匀的平焰燃烧器单元中的一种或多种金属有机前体的受控热分解。 这种特征使得燃烧火焰反应器成为（1）高速生产具有受控粒度和分布的松散聚集的纳米粒子粉末的高通量工具，（2）形状保形纳米相涂层的均匀沉积，以及（3） 形状的纳米晶体独立形式如片，环和鼓。 这种新纳米材料加工技术的应用包括电，热，光学，显示，磁性，催化，摩擦和结构材料。

    Production of sized particles of uranium oxides and uranium oxyfluorides
    6.
    发明授权
    Production of sized particles of uranium oxides and uranium oxyfluorides 失效
    生产氧化铀和氧化铀的尺寸颗粒

    公开(公告)号：US3978194A

    公开(公告)日：1976-08-31

    申请号：US155079

    申请日：1971-06-21

    Applicant: Irving E. Knudsen ,  Clinton C. Randall

    Inventor： Irving E. Knudsen ,  Clinton C. Randall

    IPC: C01B13/20 ,  C01G43/01 ,  C01G43/025 ,  C01G43/02

    CPC classification number: C01G43/025 ,  C01B13/20 ,  C01G43/01 ,  C01P2004/61

    Abstract: A process for converting uranium hexafluoride (UF.sub.6) to uranium dioxide (UO.sub.2) of a relatively large particle size in a fluidized bed reactor by mixing uranium hexafluoride with a mixture of steam and hydrogen and by preliminary reacting in an ejector gaseous uranium hexafluoride with steam and hydrogen to form a mixture of uranium and oxide and uranium oxyfluoride seed particles of varying sizes, separating the larger particles from the smaller particles in a cyclone separator, recycling the smaller seed particles through the ejector to increase their size, and introducing the larger seed particles from the cyclone separator into a fluidized bed reactor where the seed particles serve as nuclei on which coarser particles of uranium dioxide are formed.

    Method for producing metal compounds
    7.
    发明授权
    Method for producing metal compounds 失效
    生产金属化合物的方法

    公开(公告)号：US3848068A

    公开(公告)日：1974-11-12

    申请号：US13597371

    申请日：1971-04-21

    Applicant: CORNING GLASS WORKS

    Inventor： RICE D

    IPC: C01B13/20 ,  C01B33/18 ,  C01F7/02 ,  C01G23/00 ,  C04B35/01 ,  C04B35/626 ,  C09C1/00 ,  H01J37/32 ,  C01G21/02 ,  C01G23/04 ,  C01G25/02 ,  C01G27/02 ,  C01G37/02 ,  C01G49/06

    CPC classification number: B82Y30/00 ,  C01B13/20 ,  C01B33/181 ,  C01F7/02 ,  C01G23/00 ,  C01P2002/32 ,  C01P2002/34 ,  C01P2002/50 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64 ,  C04B35/01 ,  C04B35/626 ,  C09C1/00 ,  H01J37/32 ,  Y10S423/10

    Abstract: 1. A METHOD FOR PRODUCING A PARTICULATE METAL OXIDE COMPRISING THE STEPS OF PROVIDING AN INDUCTION-COUPLED PLASMA TORCH, INTRODUCING A PLASMA GAS INTO SAID TORCH, SAID PLASMA GAS CONTAINING UP TO 100 PERCENT OF OXYGEN ON A FREEELEMENT BASIS, THE BALANCE OF SAID PLASMA GAS BEING SUBSTANTIALLY INERT WITH RESPECT TO SAID METAL, INITIATING A PLASMA STREAM, INTRODUCING IN PARTICULATE FORM INTO SAID PLASMA STREAM AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM, LEAD, MAGNESIUM, NIOBIUM, SILICON, TITANIUM, ZIRCONIUM, ALUMINUM, AND IRON, SAID PLASMA STREAM HAVING AN ENTHALPY SUFFICIENT TO VAPORIZE SAID METAL, ENVELOPING SAID PLASMA STREAM WITH A GAS CONTAINING UP TO 100 PERCENT OF OXYGEN ON A FREE-ELEMENT BASIS, THE BALANCE OF THE ENVELOPING GAS BEING SUBSTANTIALLY INERT WITH RESPECT TO SAID METAL AND THE PLASMA GAS, VAPORIZING THE METAL PARTICLES, REACTING THE METAL VAPORS WITH SAID OXYGEN, THE AMOUNT OF OXYGEN PRESENT BEING AT LEAST SUFFICIENT FOR STOICHIOMETRIC REACTION WITH SAID METAL, QUENCHING THE RESULTING METAL OXIDE IN A STREAM OF GAS CONTAINING UP TO 100 PERCENT OF OXYGEN ON A FREEELEMENT BASIS, THE BALANCE OF SAID QUENCHING STREAM OF GAS BEING SUBSTANTIALLY INERT WITH RESPECT TO SAID RESULTING METAL OXIDE AND SAID PLASMA GAS, SAID RESULTING METAL OXIDE BEING IN FINELY DIVIDED FORM AND BEING SUBSTANTIALLY FREE OF ANY ANIONIC IMPURITY, SEPARATING PARTICLES OF SAID FINELY DIVIDED METAL OXIDE UP TO ABOUT 0.5 UM. IN SIZE FROM SAID QUENCHING STREAM, AND COLLECTING SAID SEPARATED PARTICLES OF SAID METAL OXIDE.

    Fumed metal oxide particles and process for producing the same
    10.
    发明申请
    Fumed metal oxide particles and process for producing the same 审中-公开
    热解金属氧化物颗粒及其制备方法

    公开(公告)号：US20050238560A1

    公开(公告)日：2005-10-27

    申请号：US11158827

    申请日：2005-06-22

    Applicant: Yakov Kutsovsky

    Inventor： Yakov Kutsovsky

    IPC: C01B13/20 ,  C01B13/24 ,  C01B13/30 ,  C01B33/18 ,  C01B33/12

    CPC classification number: B82Y30/00 ,  C01B13/20 ,  C01B13/24 ,  C01B13/30 ,  C01B33/183 ,  C01P2002/60 ,  C01P2004/50 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/12

    Abstract: The invention provides a process for producing fumed metal oxide particles comprising providing a stream of a liquid feedstock comprising a volatizable, non-halogenated metal oxide precursor, providing a stream of a combustion gas having a linear velocity sufficient to atomize and combust or pyrolyze the liquid feedstock, and injecting the stream of the liquid feedstock into the stream of combustion gas to form a reaction mixture such that the liquid feedstock is atomized and subjected to a sufficient temperature and residence time in the combination gas stream for fumed metal oxide particles to form before the combustion gas temperature is reduced below the solidifying temperature of the metal oxide particle. The invention further provides fumed silica particles having a relatively small aggregate size and/or narrow aggregate size distribution.

    Abstract translation: 本发明提供了一种生产热解金属氧化物颗粒的方法，包括提供包含可挥发的非卤化金属氧化物前体的液体原料流，提供具有足以雾化和燃烧或热解液体的线速度的燃烧气体流 原料，并将液体原料流注入到燃烧气体流中以形成反应混合物，使得液体原料被雾化并且在用于热解金属氧化物颗粒的组合气流中进行足够的温度和停留时间以形成在 燃烧气体温度降低到低于金属氧化物颗粒的凝固温度。 本发明还提供了具有相对较小的聚集体尺寸和/或窄的聚集体尺寸分布的热解二氧化硅颗粒。

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