PALLADIUM and SILVER parting

PALLADIUM and SILVER parting


A silver palladium button, straight from the cupel After boiling in hydrochloric acid, the button was scrubbed with sodium carbonate Dissolving the silver palladium alloy in nitric acid During the dissolution a white to yellow crusty substance covered the button I wonder what that could be, looks like chloride or carbonate from the scrubbing. Upon dilution, the solution became cloudy Not much improvement after the second pass through the filter. I’m taking 80ml silver palladium nitrate solution as it will be needed for the next videos. To part the silver and the palladium, hydrochloric acid is slowly added to the nitrate solution, while stirring vigorously The silver precipitates as silver chloride. The so obtained palladium chloride solution is filtered. hydrochloric acid is added to the silver chloride in the beaker to wash off any palladium chloride trapped by the AgCl. Washing continues until the colour of the silver chloride changes from creamy to snow white the silver chloride is moved from the filter to a beaker before moving to bottles both washing water and main palladium chloride solutions are filtered to remove the last traces of silver chloride I kept the washing waters and the main liquor in separate bottles transferring to bottles for later treatment note the clarity of the solutions What I have so far: 80ml silver palladium nitrate solution, silver chloride paste, a bottle of Pd chloride and the bottle containing the Pd washing waters. The last 100ml of palladium chloride solution are left in the beaker Sodium carbonate is added, note the colour shifts from ruby to amber to green. adding formic acid drop-wise. the solution is heated to about 80C more formic acid more sodium carbonate after some boiling the solution clears and the palladium black coagulates The barren solution was decanted and new 200ml portion Pd chloride was added to the beaker And again solution is heated and sodium carbonate and formic acid were added in the same manner Ok, I think I’m getting the hang of it! This should be pure palladium In the meantime I had some formic acid left in the small beaker, to which I’ve added some sodium carbonate, making, what I believe is sodium formate I’ve read you can get 9999 silver powder from silver nitrate solutions as long as you don’t have any PGM’s present. let’s give it a try I’m adding dirty silver nitrate solution to the sodium formate instant reaction ok I’ll make a video on the subject! lets call it a day the experiments will continue in the next video thanks for watching lease don’t forget to like and subscribe

16 Comments

  1. You’ve got about 125ml. Of solution at the start, you need to add 50ml. of distilled water to it for more acid efficiency and to avoid crystallization in solution…

  2. WTF?!?! How the heck did this batch grow so large? And not once did I see a test done for PMs in the solution, and waaay too many steps. Should have recovered the silver…. cemented out the rest of the PMs, redissolved it in HCL and either sodium hydroxide or h2o2…. used ammonium chloride to reclaim any Pt and used chlorine gas to get the brick red salt…. next dissolve in ammonium hydroxide, then used HCl to drop the yellow metal salt… ready for calcining and melting. I hate these computer voices anyways…. probably why all the little details were left out.

  3. Great master work.

    It is very gratifying to be subscribed to your channel, and watch your demos.

    Thank you for sharing your knowledge.

    I wish the universe would always conspire in your favor.

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