| 摘要 |
<p>The invention relates to the production of artificial carbon-based materials, in particular to the production and purification of ultra-dispersed synthetic diamonds and can be used for extracting diamond-containing materials from the products of a detonation synthesis. The inventive method involves the detonation transformation of explosive material having a negative oxygen balance in the closed space of a blasting chamber in a nonoxidizing atmosphere, the evacuation of explosion products and the heat chemical purification thereof by a mineral acid followed by washing of impurities therefrom. The condensed detonation products are additionally exposed to the action of a shock wave, the chemical purification is carried out with a nitrogen acid aqueous solution in three stages: in the first stage, in periodic mode at a temperature ranging from 20 to 60 °C during the time of 0.5 to 5 hours; in the second stage, in continuous mode and in five temperature zones at a temperature ranging from 110 to 300 °C during the time of 20 to 120 minutes; and in the third stage, in periodic mode at a temperature ranging from 20 to 80 °C during the time of 0.5 to 5 hours with the additional blowing of a reaction mass by an oxygen-containing gas mixture. The additional action of the shock wave on the condensed products is carried out repeatedly from 1 to 50 times at intervals ranging from 5 to 20 minutes, the pressure of a front shock being specified within the range of 0.4 to 15.0 MPa.</p> |
