METHOD OF OBTAINING DIAMOND WHISKERS Russian patent published in 2012 - IPC B01J3/06 C30B29/04 C30B29/62 C01B31/06 

FIELD: chemistry.

SUBSTANCE: diamond whiskers are obtained by heterogenic liquid-phase crystallisation of diamond with interaction of carbon-containing substance with catalyst with further obtaining of diamonds in crystalline state. As catalyst used is ultradispersed palladium powder with particle size 20-50 nm, obtained by passing gaseous carbon monoxide through 2-20% water or water-organic solutions of palladium chloride PdCl₂ with 5-hour mixing. Formation of diamond whiskers occurs at atmospheric pressure and temperature from - 70°C to +100°C. After that, performed is separation of diamonds from accompanying components and catalyst, which in its turn is regenerated by processing catalyst with aqua regia HNO₃+3 HCl) in ratio palladium powder: aqua regia equal 1:3. Obtained solution is filtered, after which solid deposit is thermally processed at temperature 600°C.

EFFECT: simplification of process of obtaining diamond whiskers.

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