plante1999
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Refining gold
I refined some gold plated computer part to remove major copper contamination using air, HCl and little peroxide to start the reaction (copper II
chloride etching), I got gold foil pieces with a little copper. I disolved these foil with 30% HCl and a little amount of sodium hypochlorite 12% sol.
to make a diluted quite pure diluted Chloro auric acid sol. Then I added very diluted ferrous sulphate solution to precipitate the purified gold. The
sol. of the reaction turned quite dark brown, now I wait to lets the powder decant. Wath Can I do with gold powder? Any interesting use? I have tough
to make gold II oxide by dissolving the gold and precipitating it with sodium hydroxide, and use it as an oxidizer (quite costly actually).
[Edited on 18-6-2012 by plante1999]
I never asked for this.
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cyanureeves
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about five times now i have tore down computer parts for the gold and only once recovered a tiny b.b. from now on i will either keep the foils as is
or drop the gold from the auric chloride solution with ammonium hydroxide and get the red gold dust. sodium metabisulphate has only worked for me when
i dissolved rings and other jewelry. about 4 times i couldnt even drop a significant amount of gold from 1/20 kt. rg. i will go for the red gold on
that next time too. the red ammonia gold can be added to a plating solution at least ,some people explode the red gold.
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plante1999
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I got 0.1g of pure fine brown gold powder! Now I will refine more Electronic waste to get 1g of it and then I will make experiment with it. The powder
look much like the powder in this video at 5:00
http://www.youtube.com/watch?v=Hv4CcaTVJqY
I never asked for this.
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blogfast25
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As long as you're not trying to make a profit, because that's very hard on a small scale...
I got a bit of gold dust from one mobile a few weeks back.
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plante1999
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Quote: Originally posted by blogfast25  | As long as you're not trying to make a profit, because that's very hard on a small scale...
I got a bit of gold dust from one mobile a few weeks back. |
I'm not looking to make profit, only to get OTC free gold.
How much gold did you get?
I never asked for this.
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blogfast25
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I haven't weighed it yet. I guess about 0.1 g.
I dissolved first in HNO3 70 % to remove copper and other non-noble metals. Then Aqua Regia on the residue. I precipitated with metabisulphite, after
part neutralising. Redissolving the gold in AR gave no blue or green whatsoever, so it's pure gold, perhaps with small amounts of Pt or Pd...
[Edited on 20-6-2012 by blogfast25]
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plante1999
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I attempted tomake gold oxide by dumping conssentre chloro auric acid in sodium carbonate but nothing precipitated even after a few minutes, so I
re-acidified my sol. and used again ferrous sulfate to precipitate it, I dont think I will get much gold now, I think I spoilled my gold...
I never asked for this.
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blogfast25
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| Quote: Originally posted by plante1999 | | I attempted tomake gold oxide by dumping conssentre chloro auric acid in sodium carbonate but nothing precipitated even after a few minutes, so I
re-acidified my sol. and used again ferrous sulfate to precipitate it, I dont think I will get much gold now, I think I spoilled my gold... |
Nothing ever gets lost in chemistry, plante, just mixed in with other stuff  ...
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Poppy
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I got such a mishap with my gold refining too. The yield was expected to approach 1g, but I distrusted sodium bisulfite reducting power and added a
lot of it. The resulft was chevreul's salts mistaken as silver and gold climbing somewhere into it.
Now I have 1g gold spreaded over 4L solution lol. If gold really precipitated I shud have no difficulties redissolving chevreul's salts and
recovering gold even if its inside such a large vessel.
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violet sin
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but in 4L of sol. better than spread over the desk... I bought a few large boxes of OLD cell phones really cheap when a long time local repair
shop/service provider went under. after picking off all the easy spring terminals and what not, and dissolving the copper, I had a decent pile of
gold flake. it filled a small vial 90%(5ml) but I noticed a bit of copper still in there on the backsides of some of it. so I added peroxide and
HCl to let it etch away the residual... stayed up too long cleaning the other phases of the process up to make more and decided to go to bed. but
not before I put the top on the vial and a few moments later I heard a faint "pop!" I was in disbelief when I could not locate the vial.., but did
find portions(1/2 at best) of my gold... in a several foot splatter pattern.
never did that again. but have made more bb's of gold.
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Eddygp
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Try to make some organic chemistry with gold. It is a bit difficult but really satisfactory (the chloro(dimethyl sulfide)gold(I) is incredible). Or
you may try to make some interesting chloroaurates.
there may be bugs in gfind
[ˌɛdidʒiˈpiː] IPA pronunciation for my Username |
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platedish29
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Impure gold stains, a bit, flush ...
This coordinated organic compound of yours, is probably worth the trickery.
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