SHUNGITE CARBON GRAPHITIZATION METHOD Russian patent published in 2023 - IPC C01B32/205 

FIELD: nanotechnology.

SUBSTANCE: invention can be used in the production of catalysts and catalyst carriers, electrodes for high-capacity current sources, fuel cells, filters, hydrogen and methane storage materials, heat-insulating coatings, coatings for protection against electromagnetic radiation, photonics and biotechnology materials. Shungite rock is crushed in a jaw crusher, disintegrate in a ball mill and a ceramic grinder to a powder fraction of less than 40 microns. The resulting shungite powder is poured with water, settled and filtered. The powder remaining on the filter is dried, dispersed in water, filtered again and dried. The dried powder is dispersed in water by ultrasound and filtered. The resulting aqueous dispersion of carbon nanoparticles from shungite is centrifuged in an ultracentrifuge. Then the dispersion is condensed and dried to obtain a powder of shungite carbon nanoparticles, which is sent for heat treatment in an inert gas atmosphere carried out in a heat chamber by rapid heating to 2950°C or more, kept at this temperature for 5-10 s and cooled to room temperature. The resulting graphite is not inferior in characteristics to graphites obtained by previously known methods.

EFFECT: invention makes it possible to obtain graphite from non-graphitized carbon material (shungite) in an environmentally friendly way that does not require the use of toxic organic reagents and their subsequent removal.

1 cl, 2 dwg, 2 tbl