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2 178 009

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Application

2001103150/02, 2001-01-25

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Start date

2001-01-25

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Actual filing date

2001-01-25

(45)

Published

2002-01-10

(72)

Inventor

Vorob'Ev-Desjatovskij N.V.Ukraintsev I.V.Bojakov I.G.Timofeev V.N.Fedotov A.D.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Nauchno-Proizvodstvennoe Ob"Edinenie

METHOD OF RECOVERING GOLD AND SILVER FROM CYANIDE SOLUTION Russian patent published in 2002 - IPC

Abstract RU 2178009 C1

FIELD: precious metal technologies. SUBSTANCE: method includes filtration of initial solution, deoxygenation, and treatment of deoxygenated solution with zinc followed by loading of resulting pulp onto precipitating filter. Zinc is preliminarily treated with solution of at weight ratio CuSO45H2O, within the limits between 3 and 15. Alternatively, zinc can be treated with solution of Zn/CuSO45H2O at weight ratio 3.5 to 18 or with CuCl22H2O, solution of Cu(CH3COO)22H2O at weight ratio 4 to 20. Reduction of gold and silver achieves degree at least 99%. EFFECT: increased degree of metal recovery and eliminated use of toxic lead compounds. 4 cl, 1 tbl, 3 ex

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RU 2 178 009 C1

Authors

Vorob'Ev-Desjatovskij N.V.

Ukraintsev I.V.

Bojakov I.G.

Timofeev V.N.

Fedotov A.D.

Dates

2002-01-10—Published

2001-01-25—Filed

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