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Author: Subject: Few questions about Gold recovery
Romix
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[*] posted on 27-6-2021 at 01:40


This black mud of the walls turning yellow so not gold...

[Edited on 27-6-2021 by Romix]

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[*] posted on 27-10-2021 at 19:14


Iron(II) sulfate best precipitant from dirty solutions, all gold dropped out in seconds!!


[Edited on 28-10-2021 by Romix]

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[*] posted on 27-10-2021 at 19:16


Dirty, because I didn't filter Iron(II) sulfate before the precipitation.
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[*] posted on 27-10-2021 at 20:02


ALSO toxic gases not coming off.
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[*] posted on 29-10-2021 at 20:12


Had an accident, lucky 5 liter PET bottle was standing in a bath, and all concentrated slightly basic KNO3 escaped in to the drain.
KNO3 crystalized out nicely out of it. Had a go crystalizing it before I went to bed and situation above happened.
Very very very diluted KOH ate a crack at the button of the PET bottle. Now I'll use HDPE canister instead.
That shows that KOH is a much stronger base then NaOH. Was boiling PET in NaOH for hours and only yielded 1 gram of terephthalic acid at the end.
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[*] posted on 29-10-2021 at 20:26


Also bases like NaOH and KOH eats glass too... Once had a jar standing with galvanized with zinc steel bits...
And it ate a crack in that too and leaked out. It's ok to filter something quickly in a borosilicate, but not boiling it in it.
What for? I think I was recovering zinc with aluminium from basic complex.
Unfortunately not tried melting this zinc because of the accident.
Might melt might not. For example tin recovered from chloride salt not melting.

[Edited on 30-10-2021 by Romix]
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[*] posted on 29-10-2021 at 20:28


Ammonia solution much weaker base, stood in PET bottle with a nickel coin in for years with out any cracks.
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[*] posted on 29-10-2021 at 20:48


What about recovering Tin with electrolysis, is Chlorine coming off? You'll need to make a set up to use it some where else in a different reaction.
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[*] posted on 15-1-2022 at 15:47


Lucky, found two good lenses!! Usually you get short and thin 16 bonding wires on a lenses. Here you get that much only on one side of lens. And there's 3 more sides like that. And wires are longer and thicker.

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