dissolving gold in board with potassium cyanide

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    How to make potassium gold cyanide - Finishing

    11. Make another concentrated Potassium Cyanide solution (KCN). 12. Pour the KCN into Fulminating Gold slowly with agitation until all the fulminate dissolv

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    How to Make Potassium Gold Cyanide - Scribd

    I need information about the ff: a. how to produce potassium gold cyanide b. uses of potassium gold . Pour the KCN to Fulminating Gold slowly with agitation until all the fulminating dissolve. Extraction of Gold From Computer Boards.

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    Gold and Silver Plating Basics : Products Finishing

    Feb 22, 2011 . Potassium gold cyanide, KAu(CN)2, together with dipotassium or disodium . staining problems and attacked printed circuit board laminates then in use. or to reduce it somewhat so as to avoid dissolution of photoresists.

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    Gold - Encyclopedia - Theodora

    The specific gravity of gold obtained by precipitation from solution by ferrous sulphate is .. By the cyanide process, i.e. dissolving the gold in potassium cyanide . and at other points with boards having transverse notches filled with mercury.

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    "Gold Recovery for Dummies?" - Finishing

    A. You can leach it off with a 5% solution of sodium or potassium cyanide (REALLY . I have also researched that using aqua regia to dissolve the gold might work but .. to electroplate out the copper and nickel from circuit board connectors.

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    Leaching of gold and silver from printed circuit board of mobile phones

    Leaching of gold and silver from printed circuit board of mobile phones . This process consists in a leaching of the PCB's residues by dissolving the metals with an . This product is supplied as a liquid containing potassium cyanide in a.

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    Chemical Behavior of the Components of the KCN / KAu ( CN ) 2 .

    Analyses confirmed that gold would dissolve, to any extent, only in those aqueous potassium cyanide solutions exposed to air. The reactions of potassium.

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    How To Extract Gold From Electronics - Instructables

    In this Instructable, I will show you how to extract gold from computers using products most people have lying around in their hom The way I extract the gold is.

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    Electroless Deposition of Gold

    pure soft gold on semiconductors and circuit boards without employing an external . source of gold, potassium borohydride, KBH4, or dimethy- lamine borane ... bath makeup while a solution prepared by dissolving AuIII(OH)3 in dilute KOH .. of cyanide-based electroless gold plating baths containing reducing agents.

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    Gold and Platinum Refining & Recovery Systems / Equipment

    Commonly, if you refine things such as circuit boards yourself, you get about 8-10 . The losses of gold left dissolved in the solution will be less than 4 parts of.

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