METHOD OF PRODUCING FINE-GRAINED SUPPORTED CATALYSTS AND SYNTHESIS OF CARBON NANOTUBES Russian patent published in 2009 - IPC B01J37/00 B01J23/74 C01B31/00 B82B3/00 B01J21/00 

FIELD: chemistry.

SUBSTANCE: invention relates to synthesis of nanomaterials, which can be used as supported catalysts for various processes, including carbon nanotubes with controlled number of layers. A method is described for preparing fine-grained supported catalysts for synthesis of single-layer and multi-layer carbon nanotubes with controlled number of layers. The method involves preparation of aqueous solutions of components, which contain carbohydrates and ions of metals of active components and carriers, mixture of which leads to formation of complexes between carbohydrates and metal cations, with subsequent heating of the obtained syrups, which allows for obtaining finely dispersed foam, which undergoes controlled oxidation after drying, thereby obtaining fine-grained supported catalysts which contain active components in form of fine-grained or X-ray amorphous compounds. Also described is synthesis of multi-layer and single-layer carbon nanotubes, on which the catalysts described above are heated to the reaction temperature ranging from 550 to1000°C in a current of inert gas, such as Ar, N₂, He, after which carbonaceous reagents, such as ethylene or acetylene, or methane, or propane and butane mixture, or their mixture, are fed into the reactor.

EFFECT: efficient and environmentally safe method of producing active fine-grained supported catalysts.

6 cl, 2 tbl, 9 dwg, 19 ex