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  2. Wohlwill process - Wikipedia

    en.wikipedia.org/wiki/Wohlwill_process

    The process was invented in 1874 by Emil Wohlwill. This electrochemical process involves using a cast gold ingot, often called a doré bar, of 95%+ gold to serve as an anode. Lower percentages of gold in the anode will interfere with the reaction, especially when the contaminating metal is silver or one of the platinum group elements.

  3. Gold parting - Wikipedia

    en.wikipedia.org/wiki/Gold_parting

    Invented by Emil Wohlwill in 1874, the Wohlwill process produces the highest purity gold (99.999%). It is an electrolytic process using pure gold for the cathode (or titanium as a starter cathode) and chloroauric acid (gold chloride-hydrochloric acid) as the electrolyte; this is made by dissolving gold with chlorine gas in the presence of ...

  4. Electrolytic process - Wikipedia

    en.wikipedia.org/wiki/Electrolytic_process

    The video describes the electrolytic process as it is occurring on Captain Kidd's Cannon, which is on display and currently undergoing the electrolytic process. An electrolytic process is the use of electrolysis industrially to refine metals or compounds at a high purity and low cost. Some examples are the Hall-Héroult process [1] used for ...

  5. How to Make Investment Gold From Paper

    www.aol.com/news/2011-12-01-how-to-make...

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  6. Gold extraction - Wikipedia

    en.wikipedia.org/wiki/Gold_extraction

    The chloride process became obsolete with the development of the cyanide process. [22] [23] In 1887, John Stewart MacArthur, working in collaboration with brothers Dr Robert and Dr William Forrest for the Tennant Company in Glasgow, Scotland, developed the MacArthur-Forrest Process for the extraction of gold ores. By suspending the crushed ore ...

  7. Electroforming - Wikipedia

    en.wikipedia.org/wiki/Electroforming

    Electroforming process Electroforming is a metal forming process in which parts are fabricated through electrodeposition on a model, known in the industry as a mandrel . Conductive (metallic) mandrels are treated to create a mechanical parting layer, or are chemically passivated to limit electroform adhesion to the mandrel and thereby allow its ...

  8. Here's what Kash Patel's former colleagues are saying about him

    www.aol.com/heres-kash-patels-former-colleagues...

    Patel also was involved in efforts to bring some of the most-wanted terrorists to the U.S. for prosecution, and worked on Trump administration efforts to return dozens of U.S. hostages back home.

  9. Plasma electrolytic oxidation - Wikipedia

    en.wikipedia.org/wiki/Plasma_electrolytic_oxidation

    The part to be coated is immersed in a bath of electrolyte which usually consists of a dilute alkaline solution such as KOH. It is electrically connected, so as to become one of the electrodes in the electrochemical cell, with the other "counter-electrode" typically being made from an inert material such as stainless steel, and often consisting of the wall of the bath itself.

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