Latest Inventions  Prospecting, production activity and waste handling of minerals Ore mineral resources PROCESS FOR EXTRACTING GOLD AND(OR) SILVER OUT OF WASTE MATERIALS
PROCESS
FOR EXTRACTING GOLD AND(OR) SILVER OUT OF WASTE MATERIALS
FIELD: extraction of gold and(or) silver out of
waste materials in electronics, electrochemical and jewellery industry branches.
SUBSTANCE: method comprises steps of
electrochemical dissolution of gold and silver in aqueous solution at
temperature (10 -70)C in presence of complexing agent; using as complexing agent
sodium ethylendiamine tetraacetate with concentration (5 - 150)g/l; realizing
dissolution at pH 7 - 14 and electric current density (0.2 -10)A/sq.dm.
Invention allows to reduce copper content in slime deposit until (1.5-3)%.
EFFECT: possibility for increasing dissolution
rate of gold and silver.
Bochkarev V.M.,
Kochneva N.N., Buchikhin E.P., Zhilin Ju.S.
Patent number: 2194801
Publishing date: February 4, 2003
To make the order on reception of the complete information under the invention, interesting for you
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