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http://www.goldnscrap.com/index.php/gold/81-gold-reduction-with-oxalic-acid-complete-process ** In this video i’ll show the complete process for the reduction of gold from chloroauric acid using oxalic acid and pH adjustment.
This process is used exclusively as a second refining step. Meaning, the initial Aqua Regia solution already contains high putiry gold that was refined once in to the area of 99-99.9%.
Unlike The previous video (see link below), the gold dropped this way doesn’t precipitate as a cool lava lamp, but rather as fine brown powder that clumps together easily. Nice and shiny looking Dendrites might grow here and there. It is still very pure though
** The complete written tutorial which includes more pictures and exact amount of reagents used is now available here:
This is the first time i’m uploading a video with narration. Hope you will find it more convenient and easy to understand.
Learn more about Gold, Silver and PGM’s Recovery & Refining at Gold-N-Scrap website: