dissolving gold in board with potassium cyanide

  • Electroless Deposition of Gold

    source of gold, potassium borohydride, KBH4, or dimethy- lamine borane ... mounting devices on circuit boards, which in turn created new requirements for ..... initial 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 - Encyclopedia - Theodora.com

    Gold, - Encyclopedia. ... By the cyanide process, i.e. dissolving the gold in potassium cyanide solution, and then precipitating the metal; 5. ... direction of the current, and at other points with boards having transverse notches filled with mercury.

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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 ... to Fulminating Gold slowly with agitation until all the fulminating dissolve.

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  • Patent US3957505 - Gold reclamation process - Google Patents

    May 18, 1976 ... Gold is recovered from gold bearing materials by dissolving gold in an ... Generally a potassium cyanide solution is used in the "cyanide process". ... plated printed circuit boards and other gold coated metal, plastic, glass and...

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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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  • "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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  • How to prepare gold potassium cyanide in simple route ...

    Sep 24, 2016 ... At presently I am preparing gold potassium cyanide in the following method Step 1: Preparation of Aqua regia Step 2: Dissolving gold in Aqua...

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  • Removing gold from electronics, page 3 - Finishing

    I've got about 15 lbs of gold plated circuit boards, Does any one have the .... need one to two teaspoon of sodium sulfite for each ounce of gold metal dissolved. ..... from a NX stripper(base)that has Potassium Cyanide in it to strip the gold that...

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  • Increase Potassium Cyanide Leaching Reaction with Gold & Mercury

    Nov 2, 2016 ... Increase Potassium Cyanide Leaching Reaction with Gold & Mercury ... He found that the gold was more rapidly dissolved than if no carbon...

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