Patent ID: 7867467

Claim:
Nanodiamond comprising carbon, hydrogen, nitrogen and oxygen wherein the carbon is diamond cubic modification and x-ray amorphous phase carbon with a ratio (82-95):(18-5) mass % of carbon mass, respectively, and comprising mass %: Carbon 91.0-98.0 Hydrogen 0.1-5.0 Nitrogen 1.5-3.0, and Oxygen 0.1-4.5 and wherein the nanodiamond has been prepared by detonating carbon-containing explosive with negative oxygen balance in closed volume and in gaseous environment being inert towards carbon, surrounding charge of explosive with by condensed phase containing required amount of deoxidizer a mass ratio of the deoxidizer in the condensed phase to a mass of used carbon-containing explosive not less than 0.01:1 respectively, chemically refining by treating formed products with 2-40% aqueous nitric acid along with compressed air oxygen at 200-280° C. and pressure 5-15 MPa.