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Application

92003543/04, 1992-11-03

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Actual filing date

1992-11-03

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Published

1995-08-09

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Inventor

Avdeev V.V.Nikol'Skaja I.V.Voronkina A.V.Bubnov V.K.Zajachkovskij A.A.Kapkanshchikov A.M.Anikeenko V.A.Jugaj A.V.Ezhov A.A.Shatokhin N.N.

(73)

Holder

Avdeev Viktor Vasil'Evich

METHOD OF DETERMINATION OF DIAMONDS IN NATURAL GRAPHITE-CARRYING ORES AND IN THEIR FLOTATION CONCENTRATES Russian patent published in 1995 - IPC

Abstract RU 2041459 C1

FIELD: chemical analysis. SUBSTANCE: starting product is treated with reagent (concentrated sulfuric acid + K2Cr2O7, concentrated sulfuric acid + (NH4)2S2O8, concentrated sulfuric acid + KNO3) at room temperature for the course of 10-30 min. Compound of introduction into graphite formed in this case is transformed by thermal treatment at 500-600 C into expanded graphite. Selective oxidation of expanded graphite is conducted in process of alkaline alloying of sample which is also performed to disintegrate rock. After this isolated crystals of diamonds are burnt at 1000 C in current of oxygen and content of carbon is determined by potentiometric titration. EFFECT: expanded application field, improved accuracy of analysis. 3 cl, 1 tbl

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RU 2 041 459 C1

Authors

Avdeev V.V.

Nikol'Skaja I.V.

Voronkina A.V.

Bubnov V.K.

Zajachkovskij A.A.

Kapkanshchikov A.M.

Anikeenko V.A.

Jugaj A.V.

Ezhov A.A.

Shatokhin N.N.

Dates

1995-08-09—Published

1992-11-03—Filed

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