METHOD FOR PRODUCING IRON CARBIDE NANOPOWDER Russian patent published in 2021 - IPC C01B32/914 B82B3/00 B22F9/14 

FIELD: chemistry.

SUBSTANCE: invention relates to production of iron carbide, specifically to production of iron carbide nanopowders free of metallic iron by gas-phase methods, and can be used in such fields as electrochemistry, catalysis, biomedicine. Proposed is a method for producing an iron carbide nanopowder free of metallic iron in a loose-bulk state with an average particle size of less than 50 nm, including evaporation of iron from a drop of molten iron suspended in a high-frequency field of a countercurrent inductor in a vertically oriented reactor, capture of iron vapours from the drop by a continuous downward flow of an inert carrier gas, condensation of iron vapours into iron nanoparticles in the condensation zone, interaction of iron with carbon in the gas phase in the iron nanoparticles downstream in the reaction zone, transfer of the formed iron carbide nanoparticles by the carrier gas flow into the cooling zone and capture thereof with a filter, wherein a carbon-containing gas introduced into the carrier gas flow above the reaction zone through an annular gap in the reactor is used as a source of carbon. To produce iron carbide nanoparticles without the content of metallic iron, the annular gap is located at a distance of 6 to 7 mm from the lower coil of the countercurrent inductor.

EFFECT: provision of a method for producing iron carbide free of metallic iron, the high technological efficiency of the method, which provides a possibility to significantly expand the range of use thereof.

2 cl, 2 dwg, 1 ex