Can pretty much any solution go into the stockpot? I'm trying to find more information and I'm really not very good at finding this information out please help me out.
justinhcase said:I find that no single stock pot is absolute.
They will all contain a broad spectrum of metals and compounds.
But it helps if you do your best to keep some things as separate as possible so the concentrations give you a head start in separation.
I use copper in all my primary waste stock pot's. first(Waste Pot 1) Au and P.G.M collector pot, if you have a large lab I suppose you might want to separate these as well but I am only a baby. Then I have my silver stock pot(W.P.2.) to which I put all my chlorides and silver wash water , I actually use it as a second settling tank for clear liquor form W.P.1. as well just in case any value has snook by. W.P.3 . is for Ammonia wash, only 5L but it gives you a day or two to deal with it.
They all except the ammonia feed into a secondary waste tank seeded with Iron scrap before going to P.H. augmentation and final liquid disposal .
I would LOVE free nitric acid. :lol:Lou said:Generally though, you don't want free nitric acid!
justinhcase said:"justinhcase - When you do the pH augmentation on your final waste tank, do you use a pH meter or observe the color of the solution ? what chemical do you prefer for the pH increase ?"
The PH meters do not seem to survive long in the refining shed so I use universal PH indicator paper.
It is 20p a role and it never runs out as long as you keep it in a sealed jar.
and sodium hydroxide is the cheapest and most available and soluble alkali to me.
After I have taped of the waste into a clean barrel.kernels said:justinhcase said:"justinhcase - When you do the pH augmentation on your final waste tank, do you use a pH meter or observe the color of the solution ? what chemical do you prefer for the pH increase ?"
The PH meters do not seem to survive long in the refining shed so I use universal PH indicator paper.
It is 20p a role and it never runs out as long as you keep it in a sealed jar.
and sodium hydroxide is the cheapest and most available and soluble alkali to me.
Thanks for taking the time to answer! Appreciate it! One last question, can you tell me what pH you aim for ? I think the tutorial says to aim for 2.5, but I'm not sure what the reason is for that, I assume Iron-hydroxide is not very soluble at that pH ? THANKS!
saadat68 said:--------
All of silver chlorides in stock pot will reduce to silver metal by copper. Right?
anachronism said:saadat68 said:--------
All of silver chlorides in stock pot will reduce to silver metal by copper. Right?
In a word. No. Copper does not reduce Silver Chloride to metallic silver. You're confusing this with Silver Nitrate.
saadat68 said:No I didn't confused. My thought was maybe copper in excess acid in stock pot reduces silver chloride to silver like iron in dilute sulfuric or zinc in hcl
Thanks all
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