B - Operations – Transporting – 03 – C
Patent
B - Operations, Transporting
03
C
B03C 1/023 (2006.01) B01D 49/00 (2006.01) B03C 1/005 (2006.01) B82B 3/00 (2006.01) C01B 31/02 (2006.01)
Patent
CA 2575479
There is provided a method of purifying carbon filamentary structures contaminated with magnetic metal particles. The method comprises submitting a gaseous phase comprising said carbon filamentary structures contaminated with magnetic metal particles, to an inhomogeneous magnetic field for at least partially trapping said magnetic metal particles, thereby reducing the proportion of said magnetic metal particles present in said gaseous phase. The method is particularly useful for purifying carbon filamentary structures such as multi-wall carbon nanotubes, single-wall carbon nanotubes or carbon fibers. An apparatus for purifying such carbon filamentary structures contaminated with magnetic metal particles is also provided.
L~invention concerne un procédé de purification de structures filamenteuses de carbone contaminées par des particules métalliques magnétiques. Le procédé comprend l~étape consistant à soumettre une phase gazeuse comprenant lesdites structures filamenteuses de carbone contaminées par des particules métalliques magnétiques, à un champ magnétique non-homogène de façon à piéger au moins partiellement lesdites particules métalliques magnétiques, réduisant de ce fait la proportion des dites particules métalliques magnétiques présentes dans ladite phase gazeuse. Le procédé est particulièrement utile pour purifier des structures filamenteuses de carbone telles que des nanotubes de carbone à parois multiples, des nanotubes de carbone à paroi unique ou des fibres de carbone. L~invention concerne également un appareil de purification de telles structures filamenteuses de carbone contaminées par des particules métalliques magnétiques.
Larouche Frederic
Smiljanic Olivier
Stansfield Barry L.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Institut National de La Recherche Scientifique
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