METHOD OF PRODUCING CARBON-CONTAINING NANOTUBES Russian patent published in 2012 - IPC C01B31/02 B82B3/00 

FIELD: chemistry.

SUBSTANCE: invention can be used to produce carbon-containing nanotubes on an industrial scale. Metal is placed in a container made from carbon-containing material, e.g., a graphite crucible. The carbon-containing material is heated to evaporation temperature, evaporated and decomposed in a stream of inert gas while exposing the metal to a beam of electrons with energy 0.4-3 MeV and power of not more than 500 kW so as to cause at least melting of the metal at pressure close to atmospheric pressure. The inert gas streams flows at a rate of 0.5-25000 l/min. The stream of inert gas can additionally contain carbon-containing gas - carbon dioxide, carbon monoxide, a saturated hydrocarbon with general formula C_nH_2n+2, where n=1-10, or acetylene or propylene; pairs of carbon-containing liquids, e.g., alcohols C_nH_2n+1OH, where n=1-4. The obtained nanotubes are removed from the stream of inert gas as it cools. The nanotube powder does not contain foreign matter inclusions.

EFFECT: invention enables to obtain single- or multi-layer nanotubes consisting of carbon or a metal carbide of high purity.

15 cl, 3 dwg, 4 ex