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IPC

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Application

99109816/12, 1999-05-13

(24)

Start date

1999-05-13

(22)

Actual filing date

1999-05-13

(45)

Published

2001-02-20

(72)

Inventor

Kazakov V.G.Kazakov M.V.Kozhukhova S.A.Gordeev A.P.Dovgal' Eh.Ja.Kostylev A.I.Pokrovskij Ju.G.Mikhajlov A.A.Kanjukov V.V.Skobelev A.P.

(73)

Holder

Aktsionernoe Obshchestvo Otkrytogo Tipa Zavod

METHOD OF PURIFYING SUPERHARD MATERIALS FROM IMPURITIES Russian patent published in 2001 - IPC

Abstract RU 2163222 C2

FIELD: production of superhard materials: e.g. synthetic diamonds, cubic boron nitride. SUBSTANCE: method comprises treating original stock with nitric acid in concentration of at least 60% at 200-300 C and pressure of 6-20 atm. Invention makes it possible to attain high degree of purification of superhard materials during purification process. EFFECT: reduced cost price and higher quality of final products, smaller amounts of toxic and ecologically dangerous waste. 3 ex

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RU 2 163 222 C2

Authors

Kazakov V.G.

Kazakov M.V.

Kozhukhova S.A.

Gordeev A.P.

Dovgal' Eh.Ja.

Kostylev A.I.

Pokrovskij Ju.G.

Mikhajlov A.A.

Kanjukov V.V.

Skobelev A.P.

Dates

2001-02-20—Published

1999-05-13—Filed