Process and apparatus for producing and separating fullerenes
    19.
    发明授权
    Process and apparatus for producing and separating fullerenes 失效
    用于生产和分离富勒烯的方法和设备

    公开(公告)号:US5304366A

    公开(公告)日:1994-04-19

    申请号:US814721

    申请日:1991-12-24

    IPC分类号: C01B31/02 C09C1/44

    摘要: A process and apparatus is described for the production of purified fullerenes using a non-reactive gas to collect and transport impure fullerenes from an evaporation zone to a heated filter zone in which solid impurities may be filtered out of the mixture. If one or more condensed fullerenes are present in the gas stream entering the filter zone, such condensed fullerenes may be vaporized in the filter zone and carried to a condensation zone in which one or more vaporized fullerenes may be recovered. When more than one vaporized fullerene is present in the gas entering either the filter zone or the condensation zone, a temperature gradient may be used to permit separation and recovery of purified portions of different fullerenes.

    摘要翻译: 描述了使用非反应性气体来生产纯化的富勒烯的方法和装置,以将不纯的富勒烯从蒸发区收集并输送到其中可将固体杂质从混合物中过滤出的加热过滤区。 如果在进入过滤器区域的气流中存在一种或多种凝聚的富勒烯,则这种冷凝的富勒烯可以在过滤区域中蒸发并且被运送到可以回收一种或多种蒸发的富勒烯的冷凝区域。 当进入过滤区或冷凝区的气体中存在多于一个的蒸发的富勒烯时,可以使用温度梯度来允许分离和回收不同富勒烯的纯化部分。

    Solvent modification of nitrations by N.sub.2 O.sub.4 /metal
acetylacetonate systems
    20.
    发明授权
    Solvent modification of nitrations by N.sub.2 O.sub.4 /metal acetylacetonate systems 失效
    通过N2O4 /金属乙酰丙酮体系进行硝化的溶剂改性

    公开(公告)号:US4417080A

    公开(公告)日:1983-11-22

    申请号:US386857

    申请日:1982-06-10

    CPC分类号: C07C201/08

    摘要: Aromatic hydrocarbons are nitrated by reacting the aromatic hydrocarbon in a nitrogen tetroxide-containing liquid reaction medium, in the presence of a beta-dicarbonyl compound having a "W" configuration with a carbonyl group at each apex of the "W", such as a metal acetylacetonate, preferably at a pressure and temperature sufficient to maintain the nitrogen tetroxide in the liquid state. Addition of an inert organic co-solvent to the liquid nitrogen tetroxide for the metal acetylacetonate promoted nitration of benzene essentially eliminates the production of dinitrobenzenes.

    摘要翻译: 在具有“W”构型的β-二羰基化合物与“W”的每个顶点具有羰基的存在下,通过使含四氧化二氮的液体反应介质中的芳族烃反应,使芳族烃硝化,例如 金属乙酰丙酮化物,优选在足以将氮氧化物保持在液态的压力和温度下。 向液态四氧化物中加入惰性有机助溶剂用于金属乙酰丙酮化物促进苯的硝化,基本上消除了二硝基苯的生成。