METHOD OF CRYSTALLIZING GOLD FROM ITS CONCENTRATE Russian patent published in 1999 - IPC

Abstract RU 2140460 C1

FIELD: gold mining. SUBSTANCE: initial material is ground to fineness no greater than 5 mm and treated with hydrochloric or nitric acid, after which sodium or potassium alkali or their mixture or mixture of these alkalis with organic substance, e.g. sugar, is added. Mixture is heated to at least 90 C, aged at this temperature, and leached with hot water. Liquid part is poured off and gold crystals are extracted from solid precipitate with hydrochloric acid solution. EFFECT: increased concentration of gold to at least 99%. 4 cl

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RU 2 140 460 C1

Authors

Moiseenko V.G.

Rimkevich V.S.

Dates

1999-10-27—Published

1998-04-24—Filed