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172 条记录 (耗时 0.029 秒)

    Sequestering polycyclic aromatic hydrocarbons in asphalt
    3.
    发明授权
    Sequestering polycyclic aromatic hydrocarbons in asphalt 有权
    在沥青中螯合多环芳烃

    公开(公告)号：US09249305B2

    公开(公告)日：2016-02-02

    申请号：US14506162

    申请日：2014-10-03

    申请人： Aaron S. Puhala ,  James W. Hoover ,  Xiaofan Luo

    发明人： Aaron S. Puhala ,  James W. Hoover ,  Xiaofan Luo

    IPC分类号： C08L95/00 ,  C10C3/00 ,  B27K3/38 ,  C07C15/20 ,  C08L21/00

    CPC分类号： C08L95/00 ,  B27K3/38 ,  C07C15/20 ,  C08L21/00 ,  C10C3/00

    摘要： This invention is based upon the discovery that activated carbon can be used to sequester polycyclic aromatic hydrocarbons that may be present in asphalt and creosote compositions. The treatment of asphalt and creosote compositions with activated carbon accordingly reduces the level of free polycyclic aromatic hydrocarbons in such compositions by sequestering them therein or removing them from the composition. After being sequestered the polycyclic aromatic hydrocarbons remain trapped in the asphalt or creosote composition, and are not available to the environment during normal processing into useful industrial products. This sequestration reduces the risk of exposing humans and the environment to the polycyclic aromatic hydrocarbons which would otherwise be free to migrate from the asphalt or creosote product during manufacturing and the service life of the product. In other words, the polycyclic aromatic hydrocarbons are absorbed onto the activated carbon and are not available for bioaccumulation from the environment.

    摘要翻译： 本发明基于以下发现：活性炭可用于螯合可能存在于沥青和杂酚油组合物中的多环芳烃。 用活性炭处理沥青和杂酚油组合物相应地降低了这些组合物中游离多环芳烃的含量，其中将它们封存在其中或将其从组合物中除去。 被隔离后，多环芳烃被捕获在沥青或杂酚油组合物中，并且在正常加工成有用的工业产品期间不能被环境使用。 这种隔离降低了将人类和环境暴露于多环芳烃的风险，多环芳烃在制造过程中和产品的使用寿命期间可能会从沥青或杂酚油产品中自由迁移。 换句话说，多环芳烃被吸收到活性炭上，不能用于从环境的生物累积。

    Graphene nanoribbons prepared from carbon nanotubes via alkali metal exposure
    7.
    发明授权
    Graphene nanoribbons prepared from carbon nanotubes via alkali metal exposure 有权
    通过碱金属曝光从碳纳米管制备的石墨烯纳米带

    公开(公告)号：US08992881B2

    公开(公告)日：2015-03-31

    申请号：US13378528

    申请日：2010-06-11

    申请人： James M. Tour ,  Dmitry Kosynkin

    发明人： James M. Tour ,  Dmitry Kosynkin

    IPC分类号： C01B31/06 ,  C01B31/04 ,  C07C1/32 ,  C07C15/20 ,  B82Y30/00 ,  B82Y40/00 ,  C01B31/02

    CPC分类号： C01B31/0446 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/15 ,  C01B32/184 ,  C01B32/19 ,  C01B2204/06 ,  C07C1/32 ,  C07C15/20 ,  Y10S977/896

    摘要： In various embodiments, the present disclosure describes processes for preparing functionalized graphene nanoribbons from carbon nanotubes. In general, the processes include exposing a plurality of carbon nanotubes to an alkali metal source in the absence of a solvent and thereafter adding an electrophile to form functionalized graphene nanoribbons. Exposing the carbon nanotubes to an alkali metal source in the absence of a solvent, generally while being heated, results in opening of the carbon nanotubes substantially parallel to their longitudinal axis, which may occur in a spiralwise manner in an embodiment. The graphene nanoribbons of the present disclosure are functionalized on at least their edges and are substantially defect free. As a result, the functionalized graphene nanoribbons described herein display a very high electrical conductivity that is comparable to that of mechanically exfoliated graphene.

    摘要翻译： 在各种实施方案中，本公开描述了从碳纳米管制备官能化石墨烯纳米带的方法。 通常，该方法包括在不存在溶剂的情况下将多个碳纳米管暴露于碱金属源，然后加入亲电体以形成官能化的石墨烯纳米带。 通常在加热的情况下，将碳纳米管暴露于碱金属源，通常在被加热的情况下导致碳纳米管的开口基本上平行于它们的纵向轴线，这在实施例中可以以螺旋方式发生。 本公开的石墨烯纳米带至少在其边缘上被官能化，并且基本上是无缺陷的。 因此，本文所述的功能化石墨烯纳米带显示出与机械剥离的石墨烯相当的非常高的电导率。