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Application

98104313/25, 1998-02-25

(22)

Actual filing date

1998-02-25

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Published

1999-07-20

(72)

Inventor

Volov V.N.Molchanov N.A.Ovechko N.A.Semenov S.S.Dovgal' Eh.Ja.Jashin V.A.

(73)

Holder

Aktsionernoe Obshchestvo Otkrytogo Tipa Zavod

METHOD OF ENRICHING WITH DIAMOND-GRAPHITE-OXIDE MIXTURES WITH DIAMOND Russian patent published in 1999 - IPC

Abstract RU 2133216 C1

FIELD: artificial diamonds. SUBSTANCE: 1.25-4 cu.dm of aqueous solution containing 0.1-0.8 g/cu. dm vanadium pentoxide, 0.25-3 g/cu.dm potassium hydroxide, and 1-10 g/cu.dm potassium nitrate is added to 1 kg of synthetic diamond-graphite-oxide mixture. Resulting slurry is agitated and dried at 60 to 100 C to free-running state. Material is then thermally treated in electrical oven for 3 h at 300-600-300 C, treated with alkali, for example, with 20% KOH, washed with water, and finely with acid, for example, with 20% HCl. EFFECT: improved environmental condition, essentially reduced vanadium consumption, and increased yield of diamond. 4 cl, 4 ex

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RU 2 133 216 C1

Authors

Volov V.N.

Molchanov N.A.

Ovechko N.A.

Semenov S.S.

Dovgal' Eh.Ja.

Jashin V.A.

Dates

1999-07-20—Published

1998-02-25—Filed

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