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55 条记录 (耗时 0.025 秒)

    Method of purifying nanotubes and nanofibers using electromagnetic radiation
    44.
    发明授权
    Method of purifying nanotubes and nanofibers using electromagnetic radiation 失效

    公开(公告)号：US07014737B2

    公开(公告)日：2006-03-21

    申请号：US10174477

    申请日：2002-06-17

    申请人： Avetik Harutyunyan ,  Bhabendra K. Pradhan ,  Peter C. Eklund

    发明人： Avetik Harutyunyan ,  Bhabendra K. Pradhan ,  Peter C. Eklund

    IPC分类号： D01F9/12

    CPC分类号： B82Y30/00 ,  B82Y40/00 ,  C01B32/17 ,  C01B2202/02 ,  Y10S977/845

    摘要： Disclosed are methods of purifying mixtures comprising nanofibers and/or nanotubes and residual catalyst particles that are covered by outer layers of the nanotube or nanofiber material. The mixtures are exposed to electromagnetic radiation, which induces localized heating in the residual catalyst particles. The localized heating creates breaches in the outer layers. Thereafter, the residual catalyst particles may be removed under relatively mild conditions that do not significantly affect the structural integrity of the nanotubes or nanofibers. The methods of the invention have been used to particular advantage in the purification of single wall carbon nanotubes (SWNTs) synthesized using metal catalysts. For these SWNTs, microwave radiation is preferably used to induce the localized heating, the outer layers are preferably removed at least in part by carrying out the localized heating under air, and the residual catalyst may be removed by exposure to relatively dilute aqueous acid.

    Dry powder injector
    45.
    发明授权
    Dry powder injector 有权
    干粉注射器

    公开(公告)号：US08550752B2

    公开(公告)日：2013-10-08

    申请号：US11555823

    申请日：2006-11-02

    申请人： Avetik Harutyunyan ,  Shoji Isobe

    发明人： Avetik Harutyunyan ,  Shoji Isobe

    IPC分类号： B65G53/38

    CPC分类号： B05B7/1404 ,  B05B7/1445 ,  B05B7/1472 ,  B82Y30/00

    摘要： Methods, processes, and apparatuses for the large scale synthesis of carbon nanostructures are provided. Metal catalysts having small diameter and narrow distribution of particle sizes are prepared and continuously injected as aerosols into a reactor. The metal catalysts are supported on supports that are substantially free of carbon. The metal catalyst, in the form of a powder, is placed in an injector that is shaken vertically. The powder is aerosolized, and the powder entrailed in the gas is passed through a conduit that is bifurcated where one portion delivers the powder to the reactor while the other portion connects back to the ejector that is located in between the gas source and the top part of the container.

    摘要翻译： 提供了大规模合成碳纳米结构的方法，工艺和装置。 制备具有小直径和窄粒度分布的金属催化剂，并将其作为气溶胶连续注入反应器。 金属催化剂负载在基本上不含碳的载体上。 以粉末形式的金属催化剂放置在垂直摇动的注射器中。 粉末被雾化，并且包含在气体中的粉末通过分叉的管道，其中一部分将粉末输送到反应器，而另一部分连接回位于气体源和顶部之间的喷射器 的容器。

    Methods for production of carbon nanostructures
    48.
    发明授权
    Methods for production of carbon nanostructures 有权
    生产碳纳米结构的方法

    公开(公告)号：US07981396B2

    公开(公告)日：2011-07-19

    申请号：US10727699

    申请日：2003-12-03

    申请人： Avetik Harutyunyan

    发明人： Avetik Harutyunyan

    IPC分类号： D01C5/00

    CPC分类号： B01J8/087 ,  B01J8/007 ,  B01J8/12 ,  B01J8/14 ,  B01J8/42 ,  B01J19/121 ,  B01J23/28 ,  B01J23/74 ,  B01J35/006 ,  B01J2219/0894 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/162 ,  C01B2202/02 ,  D01F9/127 ,  D01F9/1271 ,  D01F9/1272 ,  D01F9/1273

    摘要： Methods, processes, and apparatuses for the large scale synthesis of carbon nanostructures are provided. Metal catalysts having small diameter and narrow distribution of particle sizes are prepared and continuously injected as aerosols into a reactor. The metal catalysts are supported on supports that are substantially free of carbon, and the reactor is configured to control the flow of the gases such that the reaction time and contact of the reactants with the reactor walls can be controlled. Single-walled carbon nanotubes can be synthesized at a large scale and with high yields.

    摘要翻译： 提供了大规模合成碳纳米结构的方法，工艺和装置。 制备具有小直径和窄粒度分布的金属催化剂，并将其作为气溶胶连续注入反应器。 金属催化剂负载在基本上不含碳的载体上，并且反应器构造成控制气体的流动，从而可以控制反应物与反应器壁的反应时间和接触。 单壁碳纳米管可以大规模合成，产率高。

    Synthesis of small diameter single-walled carbon nanotubes
    50.
    发明授权
    Synthesis of small diameter single-walled carbon nanotubes 有权
    小直径单壁碳纳米管的合成

    公开(公告)号：US07901654B2

    公开(公告)日：2011-03-08

    申请号：US11418898

    申请日：2006-05-04

    申请人： Avetik Harutyunyan

    发明人： Avetik Harutyunyan

    IPC分类号： D01C5/00

    CPC分类号： D01F9/1272 ,  B82Y30/00

    摘要： Methods, processes, and apparatuses for the large scale synthesis of single-walled carbon nanotubes having small diameters are provided. Metal catalysts having small diameter and narrow distribution of particle sizes are prepared and continuously injected as aerosols into a reactor. The metal catalysts are supported on supports that are substantially free of carbon, and the reactor is configured to control the flow of the gases such that the reaction time and contact of the reactants with the reactor walls can be controlled. Single-walled carbon nanotubes can be continuously synthesized at a large scale and with high yields, and with small diameters and with narrow diameter ranges.

    摘要翻译： 提供了用于大规模合成具有小直径的单壁碳纳米管的方法，工艺和装置。 制备具有小直径和窄粒度分布的金属催化剂，并将其作为气溶胶连续注入反应器。 金属催化剂负载在基本上不含碳的载体上，并且反应器构造成控制气体的流动，从而可以控制反应物与反应器壁的反应时间和接触。 单壁碳纳米管可以大规模，高产率，小直径和窄径范围连续合成。