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2 096 135

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C1

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IPC

(21) (22)

Application

95115463/02, 1995-08-31

(22)

Actual filing date

1995-08-31

(45)

Published

1997-11-20

(72)

Inventor

Kovalev O.S.Kurnosov V.N.Shmeleva L.Ja.

(73)

Holder

Volzhskij Gosudarstvennyj Nauchno-Issledovatel'Skij Institut Po Razrabotke Malootkhodnoj Tekhnologii I Promyshlennoj Ehkologii

METHOD OF PREPARING COPPER POWDER Russian patent published in 1997 - IPC

Abstract RU 2096135 C1

FIELD: powder metallurgy. SUBSTANCE: when preparing fine copper powder from copper-containing waste, copper salt-containing solution formed after divinyl separation in production of organic substances is treated with dilute solution of inorganic acid to pH 1-2, precipitate is scoured and dried. All the operations are performed in the moisture- and oxygen-free inert gas flow. Resulting powder contains 99,99% copper and is characterized by dispersity 0.5-2 mcm of its 80.5% fraction. EFFECT: improved copper content. 1 tbl

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RU 2 096 135 C1

Authors

Kovalev O.S.

Kurnosov V.N.

Shmeleva L.Ja.

Dates

1997-11-20—Published

1995-08-31—Filed

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