METHOD OF OBTAINING GRAPHITE-BASED THEROEXPANDABLE COMPOUND Russian patent published in 2010 - IPC C01B31/04 

FIELD: chemistry.

SUBSTANCE: invention can be used to make carbonaceous adsorbents. Iodine heptafluoride is frozen onto a graphite-containing powdered material from a gas phase with pressure lower than equilibrium pressure over liquid-phase iodine heptafluoride. The graphite-containing powdered material is then treated with liquid-phase iodine heptafluoride to obtain an intercalation compound of fluorinated graphite by defrosting the two-component mixture to temperature of 7-25°C and then holding at equilibrium pressure of iodine heptafluoride vapour over the liquid phase. The remaining liquid phase is frozen out from the graphite-containing powdered material. The obtained powdered intercalation compound of fluorinated graphite is thermally treated in a muffle furnace.

EFFECT: invention increases the factor of increase of volume, lowers the temperature for onset of expansion using a simple and safe method which does not require complex equipment.

1 tbl, 4 dwg