METHOD OF PRODUCING MODIFIED THERMALLY EXPANDED GRAPHITE Russian patent published in 2024 - IPC C01B32/225 

FIELD: chemistry.

SUBSTANCE: invention relates to production of carbon materials modified with fine particles of metals, and can be used, for example, for making graphite foil, sorbents, catalysts, screens protecting from electromagnetic radiation. Method of producing thermally expanded graphite modified with fine particles of metals and/or alloys involves preparing a mixture containing oxidised graphite as components, at least one metal nitrate hydrate with a melting point not exceeding 60 °C, and at least one reducing agent selected from the group comprising carbamide and melamine. Obtained mixture is then dispersed by heating to the melting temperature of the metal nitrate hydrate in its own crystallization water, but not higher than 60 °C and subsequent holding at this temperature for a period of time, which reduces the amount of crystallization water until the obtained dispersed mixture is free-flowing. Further, thermal treatment is carried out in an inert atmosphere at 500-1,080 °C.

EFFECT: obtaining thermally expanded graphite modified with pure metals or alloys of these metals in a wide range of concentrations of metals with controlled physical and chemical characteristics.

6 cl, 3 dwg, 2 tbl, 10 ex