SYNTHETIC DIAMOND-CONTAINING SUBSTANCES AND A METHOD FOR SEPARATION THEREOF Russian patent published in 2007 - IPC C01B31/06 

FIELD: carbon materials.

SUBSTANCE: invention relates to inorganic chemistry of carbon and can be utilized when obtaining stable nano-diamond sols. According to an embodiment of invention, synthetic diamond-containing substance contains 82-91% carbon, 0.8-1.5% hydrogen, 1.1-2.2% oxygen, and 1.1-1.3% metallic impurities with content of non-diamond carbon 2-25% based on total weight of carbon. diamond-containing substance is characterized by ζ(zeta) potential from -40 to -85 mV. According to second embodiment, substance contains 97.5-98.5% carbon, 0.09-0.2% hydrogen, 0.3-0.5% oxygen, and 0.5-0.8% metallic impurities with content of non- diamond carbon 0.2-5% and zeta potential from 0 to -75 mV. Synthetic diamond-containing substance according to invention manifest high colloidal particle stability and are susceptible to be fractioned with narrow particle size distribution: 3 to 1700 nm and 3 to 8000 nm, respectively. Present substances are recovered by treating dry nano-diamond powder obtained from mixture of explosives (trinitrotoluene-hexogen or graphite-hexogen) in boiled organic solvents, succession of solvents going from hydrophobic solvents to hydrophilic ones so that each precedent solvent dissolves well in subsequent one.

EFFECT: increased economical efficiency and commodity of transportation of raw material and diamond-containing substances obtained thereof.

3 cl, 9 dwg, 4 ex